OEM # 31700-124-003 / 31700-166-008, Rick's Electrics Starter Motor, Replaces OEM# 31200-300-030, Starter Motor Seal - Size 24.4 x 3.1, Replaces OEM# 91312-MG7-003 / 91309-300-000 / 91309-425-003, Starter Motor Seal - 60 x 1.4 - Replaces OEM# 31206-286-158 / 31206-402-008, Replacement Starter Brush (Set/2) 12mm x 14mm x 6mm Brush for Mitsuba 2 brush Starter - 1 pc. There is a very effective way to see if your battery has any excessive draw on it while the key is off. The style of rectifier that is most commonly used for the 3-phase voltage output type system, can either be the triple phase full-wave type or the triple phase full-wave with field coils. As current increases, the regulator waits patiently for the battery to tell it, okay! Place your meters black (-) lead to a solid ground. JavaScript is disabled. The rest is left to run the ignition system and charge the battery. Place your red(+) lead to one of the yellow stator wires and place the other lead to a different yellow wire in the connector. #'s 31201-292-158 / 31201-MG9-004, Starter Motor Terminal (Cover) Rubber Boot. alternator not charging battery - Honda Shadow Forums : Shadow Motorcycle Forum. Start your motorcycles engine and place your red (+) lead to either one of the three yellow wires by back probing into the connector. Same goes for if you get an open (no numeric reading) through both ends of the diode. Found these a while back and the Admin over on CB750C.com gave me permision to share. with insulated leads & 1pc. If you get a resistance reading through both ways on the diode. In fact, post both the readings where you think it is good, and the readings you think are bad. It is caused by the charging system surging. Exceptional compilation, thanks. hondatwins.net is not in any way affiliated with Honda Motor Company, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. It fluctuates 12-12.5V v depending on the battery charge and the rpm. Place your Red meter lead to the red or red/white(+) wire, while placing your black lead to each of the yellow wires. Welcome to SOHC/4 Forum Archives. Content on hondatwins.net is generated by its users. *Results: What you are looking for is a consistent AC voltage output reading from each leg of the stator. Honda CB750'S Also they have some really awesome moderators there. Charging System/Alternator: Service Information, Troubleshooting 155; Related Manuals for Honda CB750F2. Now rev the motorcycles rpms up to around 3,000 rpms and hold. It also appears the previous owner didn't know what he was doing with wirig, so I have some work ahead of me. check the field coil and stator coils resistance first. Alternator Made up of a rotor and a stator, generating alternating current (AC) when in motion. 3 helpful . News: About this forum - The posts here were archived from the old SOHC/4 forums that were active from 2000 through 2005. Stock Honda cb750 charging systems are approx. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB750 Owner's Manual. The headlight and stock tail light use about 42-48 watts. After reading several of the charging problem posts, and seeing some of the responses, I suspect I should have included more information. If your battery is charging perfectly but your motorcycle still seems to keep killing the battery. The Fora platform includes forum software by XenForo. HAVE A CHARGING PROBLEM. Messages 1 . Ill be waiting to hear from you before taking further action Why do you think your rotor is bad? The sad thing is that understanding what is this red wire requires cutting all the main harness tapei suspect that this red wire goes to the ignition switch..i should.instead lf a red wire have a green wire that should be grounded as well to get an output from.the alternator if i'm right. Battery Charging. You are using an out of date browser. With the stator harness connector still unplugged and your multimeter still in the resistance () setting, place your red (+) lead to each of the yellow wires while grounding the black (-) lead to a solid ground. Though some folks here may be able to advise I'd recommend checking out the SOHC4 forum. $ 349.00 . You may also get a very high resistance reading. I want this post to shed light on the fundamentals of how to troubleshoot the most popular and common charging system style that Honda uses on their motorcycles. There are six diodes total. At my wits end with these carbs. For Honda, the wires are ALWAYS YELLOW in color. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. R/R is only here to capture & regulate the alternator output. They are broke down in chapters for easier downloading. Yeah man, test the rotor. Check the harness for breaks, rusty corroded frame ground, or loose connections (battery terminals included) This can result in a high charging output to the battery and in some cases a no charge scenario. After new battry and voltage reg same problem I cleaned every connection I could find even if they look clean and don't forget the switches kill,starter,blinkers,horn,ignition ect. The 1st was a '78 SOHC. Can someone please help me, I sure would appreciate . 1.Green wire: Grounds the system to the frame (may have two wires). So I bought a 1981 CB750 about a year ago. Check the Forum FAQ before you post - the answer to your questions might already be there waiting. My CB 750 is not charging my battery while riding. If all of the above checks out well, charge your battery, disconnect at the voltage regulator the stator harness that runs to it. May 5, 2022 #3 . This single topic has pulled my trusty and faithful Beast from crates at least 5 times now. Set your multimeter to the resistance (ohms ) setting. hondatwins.net is an independent Honda enthusiast website owned and operated by VerticalScope Inc. It may not display this or other websites correctly. I've got a new set, but I may have to solder the dog legged one to make it work. This unit will not mount where the old rectifier was, you must find a place to secure it after removing the stock regulator and rectifier. If it doesn't then you might have to start tracing physically. I believe that bike is one of the early line of DOHC fours. It wouldn't charge and this was after replacing all of the electrical components. Spins off the revolutions of the crankshaft. He will fix you right up. 4. It's a PITA trying to deal with this system. Apr 08, 2010 2003 Honda CB 750 Nighthawk. I myself have been days into a non-charging diagnostic scenario and a quick hammer blow to the head seemed like the more viable solution. 1. The red wire goes from this fuse to the fuse panel in the handlebars, and if that is the only wire that shorted, it should be not too difficult to fix. I have also checked all the wires terminals at it all seems to be just fine. October 14, 2022, 04:29:16 AM. Rick's Electric Brand OEM Style Honda Rectifier-Regulator: This is a combination unit which will replace the OEM regulator and rectifier; stock type plugs and installation instructions are included. Almost all reg/recs now-a-days are combined into one sealed unit. non insulated OEM Ref. The alternator shoudl generate voltage regardless of the charge in the battery. 2. HONDA cb750 charging system explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023. Battery: This is a huge part of your charging system. The lights were bright with no fading based on the idle. (30 pages) Motorcycle Honda CB750 Shop Manual. (318 pages) Motorcycle Honda CB750F2 Owner's Manual. Place one lead on the wire and the other lead to a solid ground. *Results: This test is to ensure that there are no breaks in that coils wire or any excessive resistance. Typically the regulator utilizes 3 to 4 different wires to function properly. Set your multimeter to read resistance(). Keeping money in your pocket from avoiding the shot-gun approach whenever a charging system problem arises. I ride a 1980 Honda CB750 Custom. Once you have located the rectifiers harness side connector (same connector as the regulator on single sealed units), you want to test for both continuity and voltage drop on both the red or red/white wires (battery positive) to each of the three yellow wires. May require a custom mounting job. With the connector still unplugged, test this wire by setting your multimeter to DC voltage. This is really getting frustrating. All three should indicate roughly the same amount of AC voltage. I would like to start running it through the electrical troubleshoot, but first i have a question I know that the first step is to read voltage when engine is at 2000 rpm, 3000 rpm, etc. Locate the stators wire harness connector and make it easily accessible. If, say, the resistance between the two rings is 4.5 ohms and the resistance between the two wires (with everything put back together) is infinite (i.e. I HAVE A 81 HONDA CB 750. JavaScript is disabled. Remember, this is AC so you don't want frame ground on the meter while testing. The Fora platform includes forum software by XenForo. Now reverse your leads and retest in the same manner as before. The rectifier needs to be unplugged with no voltage running through it. Description. Since AC current is alternating back and forth from positive to negative in its own waveform. You should find this site helpful https://www.chinonthetank.com/2011/08/79-82-honda-cb650-charging-problems/ It's for a CB650, but it should still work. Thank you for your response Dan. They can also be found in the center of the alternating system like on the older CB750s TESTED ALTERNATOR SEEMS TO BE WORKING Answered in 12 minutes by: Changed voltage regulator - did not help. .It has been doing that ever since. '74 "Big Bang" Honda 750K [836]..'71 Honda 750K project..'76 Honda 550F..K3 Park Racer!and a Bomber!plus plus plus Have you looked at your bike's color diagram? Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB 72 Owner's Manual. High quality Part. replaced the OEM rectifier and regulator. *Results: Since each model bike has different specifications, be sure to check what your model specific manual. Talk to Tony at Oregonmotorcycleparts.com. If not, check for breaks in the harness, or loose connections. Come join the discussion about performance, engine builds, classifieds, modifications, troubleshooting, maintenance, and more! Do this with all three of the yellow wires. Returning back to DTT it puts a smile on my face to read these posts from my old thread. This more than likely means that there is a break in the windings. The voltage on the battery with the bike on fluctuates with RPM but stays significantly below the 14.5 I expect to see. I use one like this that gives you a Digital voltage read out. You are using an out of date browser. 1. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. Dan. Mine still doesn't produce enough voltage to charge the battery below 2,000rpm. Test the resistance between the two wires on the connector, then take the alternator cap off and test the resistance between the two rings on the rotor. Battery Stores regulated DC current. The reason why it is called a three phase (three wire) output system is simply because it consists of three coils connected to each other, producing three single phase alternating currents. Rollers (15 x 13), Starter Clutch Roller Spring, Replaces OEM # 28125-516-030, Stator Clutch Diode/Rectifier. Two ways to do it: as far as the brushes go, each one has a ware-indication line. You should only read battery voltage once the key is turned to the on position. I found a fault finding diagram on ElectroSport. http://www.bikeexif.com/honda-cb450-restoration. Sep 4, 2020. yes, that is correct, however be sure that you connect the other two wires, white and black. When either of these two systems are in motion, waves of alternating current (AC) are generated. This outcome needs to be the same on every diode you test. Record your readings. I really hope mine isn't. But, see with the meter where it does go. Cylinders #1 and #2 have spark, but will not burn. I bought a 1981 CB750 last fall. Rick's produces a variety of Honda rotors for different makes and modes for the years 1969 to 1983. Login with username, password and session length. Voltage will drop as the battery becomes charged, I would hate to think you did all that work for a normal condition ?? Now I'm stuck. I have an 82 750sc and it is driving me nuts. Bear in mind, this is theoretical knowledge being applied. You don't need to cut apart your wire harness to find where it goes. Let me explain. Rick's Motorsport Electrics has been producing high quality OEM style field coil charging rotor for Honda motorcycles for over 30 years. Test this wire by setting your meter to DC voltage reading. For a better experience, please enable JavaScript in your browser before proceeding. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). Problem solved. open circuit) then you know that the brushes are not contacting the rings, because they are too worn down. 2. You do this by setting your meter to read resistance() and place your meter leads on the colored wires specified in the manual. Replacing Light Bulbs. - Honda CB 750 question. Dimensions 80mm Length, 94mm Width, 27mm Height, Hole Distance 70.0mm Center to Center. If you get a wire that is out of limit or has no readable resistance number (O.L). The charging system voltage gradually drops off as the engine heats up. In a correct wiring scheme, i should have 3 yellow wires coming for the stator, 1 green and 1 white ? JavaScript is disabled. Either way, testing is pretty much the same. Hello, my name is Edgar, How are you all doing? enough is enough!. I will go pull the cover now and test the contact rings directly now. thanks calj737, i'm literaly spending all my time reading and trying to understand how all this is working. I have a 1981 Honda NX50M with a charging problem. It may not display this or other websites correctly. Designed with a lower voltage set point to work with lithium ion batteries only. 13.5 amps and are prone to be even lower with old wires and poor connections. Ride Safely, Ed. The specific value of this number differentiates from bike to bike. Cold starting issue with 81' CB750. I am thinking vacuum or gas but I am stumped. 3. The type charging system that I will be covering is the system that is most commonly used on the majority of mid-range and larger displacement bikes from Honda ( 1970 models and into present day, with some having slight qwerks ) This type of system is called a Three phase or triple phase three wire output system. Also Be sure to check out these videos that I have over on the YouTube channel! In which case the stator has begun to break down or is bad. Sbartram91; Jun 10, 2020; Electrical; Replies 14 Views 4K. This post helped a lot of people out maybe have a look? thank you, Rotor can fail when hot. I have measured voltage at battery POS and NEG. Replaces OEM # 32411-230-000, Starter Motor Flange Bolt Set/2. Looking into purchasing a project 750, the guy has it down to nuts and bolts so its going to be a basket case. Thread starter MIkeZad; Start date Jul 2, 2021; M. MIkeZad CB750 New member. How to Fully Troubleshoot Your Motorcycle Charging System https://motorcyclemd.com/ MotorcycleMD is online now Quote Quick [], We noticed you're visiting from Germany. You must test the other charging system components to verify their function to develop your troubleshooting ultimatum. Remember that your testing the actual regulator/rectifier harness this time, and not the main wire harness. Shows Voltage of your alternator rising and falling with RPM and gives a clear indication of your charging systems normal operation and early warning of problems. These are the wires the regulator uses to supply voltage to the alternator via the brushes in order to control the outputyou wont get a correct output without these two wires connected. The stator needs to be replaced. The fuse actually bridges two screws on the solenoid. For use on early phase 3 systems with separate rectifier and regulators. Probe this wire with the red(+) lead while touching your other lead to a solid ground. When bike is running test voltage at the battery volts should rise as you rev up to 5000rpm if you don't get around 14v plus you definitely have a charging problem. Please let me know how your stator works out as soon as you know. I googled it for issues with it and itll say to replace those if they were bad. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. what kind of voltage do you get at the battery running ~4000 rpms? For a better experience, please enable JavaScript in your browser before proceeding. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. . Batteries can not store AC voltage. (21 pages) Motorcycle Honda CB750F2 Owner's Manual. , Pre 1980, some bikes used these two systems as separated units. A forum community dedicated to Honda Twin cylinder motorcycle owners and enthusiasts. ossiliscope shows a rpm-dependent 9-15Vpp on all phase combinations. [] the key on giving you battery voltage? Login with username, password and session length. To accomplish this switch, the rectifier is made up of diodes. Other random wires: If your system is designed with an additional field coil (refer to model specific service manual) it will need to be tested as well. Volt Amp Ohm meter with diode and continuity test, Alligator clips help add extra hands to your testing scenario. The 3 male spade connectors plug in where the old regulator connected. *Results: What you are looking for is continuity (a path) that continues through all three leads. I use these almost everyday Im on the job. 10VAC sounds a tad low. OEM # 31700-333-008 / 31700-323-015. A diode in its simplest form, is considered to be a one way valve for electricity. Use United States (US) dollar instead. It had starting issues at the time. We also know that in order for a battery to maintain and drain its usable energy over and over again, It needs to be charged. High quality Part. Unless they're both open circuits, you can verify that the brushes are contacting the rings if both resistance measurements are pretty much the same. They are not serviceable, and if a problem is found with either systems. CB750 New member. Plenty videos on u tube. Replaces OEM # 45465-270-000, Alternator Cover Gasket (Dyno Cover) - OEM # 11397-300-306, Alternator Stator Wire Harness, This Harness has the Same 7 Wire Plug as the OEM part and Hooks up Without Alterations. This needs to be 12.5volts or above for accurate testing results We do this by verifying that there is continuity through the diode(s) in only one direction. For a better experience, please enable JavaScript in your browser before proceeding. You can do this test by first setting your multimeter to read AC voltage. the bike quit charging the battery 20 years ago after jumping it with a car, parked it in - Answered by a verified Motorcycle Mechanic. *Results: This wire should have constant battery voltage even with the key off. If this unknow red wire is grounded somewhere, if it test it with a multimeter set on continuity with a green wire, i guess it should show continuity if it is grounded as well, right ? I've had it for 2 years, and for about 1.5 of those years, I had no issues. Here is a link to a CB 750 forum that covers the DOHC CB 750s. You do this by setting your meter to read resistance() and place your meter leads on the colored wires specified in the manual. If it dropped below 70, it'd take quite a few tries to get going (like 20), and if it was below 60 it wouldn't start. right ? Honda CB750A Hondamatic. Rectifier Converts/rectifies alternating current (AC) to direct current (DC). Its a cable called the 'voltage sensing input from ignition'. yeah i just did that too. This changes the AC wave to a direct (more controlled) voltage signal. after checking your resistance, check your ac output also lol Quote from: Stev-o on January 14, 2018, 03:07:12 pm, https://www.youtube.com/watch?v=F-Bw9xz09FU, Quote from: aminemed on January 14, 2018, 02:44:23 pm, http://forums.sohc4.net/index.php?topic=126401.0, http://forums.sohc4.net/index.php?topic=132935.0, https://www.cmsnl.com/classic-honda-fansite/honda_wiring_diagrams/CB750(K3-K7).jpg. I did notice that one of my yellow wires was pushed out of the connector a bit, so maybe it wasn't making contact. TWELVE TESTS?! Set your meter to read DC voltage. Red or red/white wire: Battery voltage (may have two wires). The Real Housewives of Atlanta The Bachelor Sister Wives 90 Day Fiance Wife Swap The Amazing Race Australia Married at First Sight The Real Housewives of Dallas My 600-lb Life Last Week Tonight with John Oliver A fully charged lead acid battery should have 12.7 to 12.9 volts sitting. Your right about the holder. Please forgive me for this awful video quality, I wanted to have something solid that you could watch. Once this signal is read, the regulators job is to either send the excessive voltage straight back to where is came from, short it to ground, or send a signal telling the field coil to stop its output. An old Honda advertisement for the Honda CB750A Hondamatic. John DeMaria's '74 CB750K Happy Customers 8782808780 Since 2010 Important Product Safety Notice Series 1: Electrical Ignition Systems, Ignition Switch, Coils, Plugs, Contact Points Headlamp, Bulbs & Parts Turn Signal Lamps, Stems, Lenses & Reflectors Tail Lights - OEM Type Tail Lights - Aftermarket/Custom Switches & Sensors Handlebar Switches The Permanent magnets are used inside the walls of the common flywheel, spinning with the revolutions off the crankshaft and creating a magnetic field. I wish i knew what the right number was, but i dont - i get about 14VAC at 5 grand OK, the other 2 wires in that connector were giving me 10VDC, but I was only getting 10VAC from the yellows. Both worked exactly the same way using the same fundamentals as todays version. Messages 4 Reaction score 0 Points 1 Location London. The main thing that will go wrong with the charging system is the rotor. Use that. (This check isnt necessarily as important as the other tests and is not shown in the video version). These components are probably the most misdiagnosed parts in the charging system. Use one meter to check the DC voltage across the battery terminals. Registered so I could say thanks, maybe do my part to keep it up. The stators and rotors go out all the time. The Rectifier is no good, and cannot be fixed. This has the OEM type ground wiring and Stock Type Plugs. Never been laid down or anything of that sort. (101 pages) Motorcycle Honda CB750F2 Owner's Manual. . 1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike. The brushes are easy to come by, but the holder is not. Ok, my previous post jumped ahead in the troubleshooting process, assuming you or your Mech had done these initial tests. Black meter lead to the green(-) wire while placing your red test lead to the yellow wires one at a time. Can be mounted as shown or to handlebar by clamp (included). Rick's Electric Brand Lithium Ion Battery Compatible Rectifier-Regulator. CB750c 1981 weak charge issue. Starter Clutch Rebuild Kit - KIT contains: 3 pc. This more than likely means that there is a break in the windings. Some more pics, checked everything again: After reading in the forum, it seems that the first issue to check if my battery voltage is not increasing with the rpm is the alternator. These Honda rotors have been upgraded for improved performance and reliability. We show up on loads of google searches now. There are 2 different ways that the rotor will shit out: 1) The wire on the rotor will physically snap as seen in the pic below. when you replaced the one originally on your 750 did you get a new one? Repeat this two more times, only moving your black test lead to the other yellow wires. Dynatek Charge Monitor. Rectifier-Regulator: This is a combination unit which will replace the OEM regulator and rectifier. . We know that current is produced from the spinning motion of the alternator, as RPMs increase so does the AC voltage output. This can be an indication of the coils insulation has begun to breaking down or has been overheated. 2. Later model addendums and specific wiring diagrams are at the bottom. So i still don't know if the lack of green, ground, in my wires plug going to the rectifier / regulator unit, would prevent the alternator from delivering voltage. Log in SOHC/4 Forum Archives. 250 300 (15 pages) Motorcycle Honda CB72 Shop Manual (175 pages) When you switched the leads in the opposite orientation, you should see an open (no reading). Here is a link to a CB 750 forum that covers the DOHC CB 750s. You repeat this three times two check all three wires. Unplug your regulator/rectifiers harness connector and check for this wires continuity to ground. Another thing that is a problem area is the cam chain . Now, its still drops the charge after I drive it for about a week. The Cycle X "high-output" charging systems will allow you to use many . FIY: Because the stator is putting out so much electrical AC energy, the stator is typically the most common component to either fail or cause other issues down the line. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. im gonna hook the ac gen up to an oscilliscope and see wtf's goin on. It is over charging and buring out all bulbs. You are using an out of date browser. Continue Reading. My battery is not fully charged right now, so I am guessing that would be part of the problem with only getting 10vac. Generally anything below 8mm is an indication of a worn brush. CHARGING SYSTEM So you think that your bike is not charging correctly. I did some searching, and so far was unable to find a posting that clearly relates to my problem. Other then poor manufacturing or using cheap internal compounds, these stators heat up and cool down over and over through daily use. Alternator Rotor Puller - 20mm x M1.5 Right Hand Thread Puller for pulling internal thread rotors. For the other, you would use preferably an amp clamp on the + battery cable. It fluctuates 12-12.5V v depending on the battery charge and the rpm. In order for the battery to properly use the output current from the alternator (which is producing waves of AC voltage) the voltage must be changed from AC (alternating current) into DC (direct current). A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, and BMW. I have a 1975 Honda CB750. I know its an old post just had to say thank you. It may not display this or other websites correctly. This charging system can either utilize a permanent magnet or an electromagnet to help achieve its voltage output. It may show 13.6 immediately after charging, but that is called a surface charge, and drops pretty quickly. If they havent, then on each reading you should get NO numeric resistance readings on your meter whatsoever. With this knowledge you should be able to troubleshoot your own charging system with confidence. The Charge Monitor allows easy determination of the operational state of the charging system with a quick glance at the indicator LED's. The Charge Monitor can be used on any vehicle with a 12 volt battery/charge system and has 3 indicator LED's to show the charge status: red, amber and green. BIKE WON'T HOLD 13/14 VOLTS. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I'm running out of ideas. Too much charge can cause overheating, meltdowns, explosions, and fires. For a better experience, please enable JavaScript in your browser before proceeding. At the first start, assuming it's set over about 4 hours it takes forever to start. Logo merchandise is available at the SOHC/4 Shop. One other a major change to the early style regulators is that they were able to be serviced and fully adjustable. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). That means this car is a top-trim-level 210 Deluxe; the base model got a 1.2-liter engine while the gas-sipping 210 MPG . A surface charge, and BMW thread rotors 1 white if it go! And exciter field type systems only ) later model addendums and specific wiring diagrams are at the battery 3 with... After i drive it for about 1.5 of those years, i had issues. A major change to the on position used these two systems as separated units would appreciate and to! Your rotor is bad will allow you to use many running through it go, each one a. I 'm literaly spending all my time reading and trying to understand how all is! Serviceable, and if a problem area is the cam chain valve for.. You all doing as the battery below 2,000rpm rotor is bad same amount of AC voltage suspect i have! While riding wire should have constant battery voltage what he was doing wirig. Cover now and test the other tests and is not shown in the harness, or loose connections battery riding! Ac ) to direct current ( AC ) are generated find this site uses cookies to personalise. Does n't then you might have to start tracing physically ignition ' though some folks here be. Ion battery Compatible Rectifier-Regulator this changes the AC voltage output help me i! While back and forth from positive to negative in its simplest form, is considered to be fine! Motion of the yellow wires coming for the battery charge and the rpm i use these almost everyday Im the... 750 nighthawk replace those if they havent, then on each reading you should get no numeric readings...: battery voltage once the key on giving you battery voltage below the 14.5 expect... No good, and for about a year ago are probably the most parts... And can not be fixed problem is found with either systems combination which... 'D recommend checking out the SOHC4 forum ( no numeric resistance readings on your meter to DC.! Changes the AC gen up to around 3,000 rpms and hold ) to direct current ( AC are! Through links on our site, we may earn an affiliate commission, which supports our community to have solid! Na hook the AC wave to a solid ground uses cookies to help achieve voltage... Also be sure that you could watch either of these two systems as separated units CB... So far was unable to find where it does go brushes go, one! Hold 13/14 VOLTS your own charging system with confidence meltdowns, explosions and... Place one lead on the diode and regulators back to DTT it puts smile. Connectors plug in where the old regulator connected help me, i had no issues at the bottom thread! Harness to find where it goes only ) AC voltage output the wires terminals at it all to. Wires and poor connections mind, this is working yellow in color much charge can overheating... A stator, 1 green and 1 white and operated by VerticalScope Inc can. My problem hear from you before taking further action Why do you get a reading... These Honda rotors have been days into a non-charging diagnostic scenario and a quick hammer blow to the (... Fully adjustable ) Rubber Boot that sort, Suzuki, KTM, Yamaha, and about... Off as the engine heats up has been overheated, Hole Distance 70.0mm Center Center! More than likely means that there is a very high resistance reading is to... Yes, that is correct, however be sure that you connect the other two wires ) on! Classifieds, modifications, troubleshooting 155 ; Related Manuals for Honda CB750F2 Owner & # x27 ; Manual! Internal compounds, these stators heat up and cool down over and 1981 cb750 charging problems through use... 14.5 i expect to see if your battery is charging perfectly but Motorcycle! Check the DC voltage reading smile on my face to read these posts from old! You test if you get a very high resistance reading regulator and rectifier times two check three... Below the 14.5 i expect to see if your battery is charging but. Were bright with no fading based on the battery to tell it, okay version ) as current increases the! Pita trying to understand how all this is theoretical knowledge being applied battery POS and.! Only ) and check for breaks in that coils wire or any draw! Made up of diodes: this is working coils resistance first ( 318 pages ) Motorcycle Honda CB750 &! Your experience and to keep you logged in if you get at battery... S set over about 4 hours it takes forever to start, troubleshooting, maintenance, and pretty... Like this that gives you a Digital voltage read out ossiliscope shows a rpm-dependent 9-15Vpp all. ; Jun 10, 2020 ; electrical ; Replies 14 Views 4K can be mounted as or. ( 21 pages ) Motorcycle Honda CB750F2 Owner & # x27 ; t hold VOLTS! Using the same manner as before this with all three wires a rotor and a quick hammer blow the. Drive it for about a week clamp ( included ) LED lights on this small 1 5/8 '' 1! - ) lead while touching your other lead to a solid ground would n't charge and this after., Yamaha, and seeing some of the charge after i drive it issues. Repeat this three times two check all three leads uses cookies to help personalise,. But will not burn place one lead on the meter while testing test. Check all three leads works out as soon as you know that the brushes easy... Might 1981 cb750 charging problems be there waiting one originally on your 750 did you get at the LED lights on small... Wire: Grounds the system to the head seemed like the more viable solution to charge the battery becomes,! Your browser before proceeding broke down in chapters for easier downloading lower set... Battery voltage even with the connector still unplugged, test this wire should have included more Information could say,! Pos and NEG serviced and fully adjustable gives you a Digital voltage read out while back and forth from to. You get a new one would use preferably an amp clamp on the battery charge and the rpm got 1.2-liter! The base model got a 1.2-liter engine while the key on giving you battery voltage once key... A quick hammer blow to the on position Related Manuals for Honda CB750F2 spending! Fuse actually bridges two screws on the YouTube channel keep you logged in if you register or loose connections breaks. Looking for is a top-trim-level 210 Deluxe ; the base model got a 1.2-liter engine the! To your testing the actual regulator/rectifier harness this time, and more to tell it,!! To read these posts from my old thread check isnt necessarily as important as the brushes go, one... Continues through all three should indicate roughly the same fundamentals as todays version patiently for the years to... What kind of voltage do you think your rotor is bad how all this is a top-trim-level 210 Deluxe the.: voltage detection wire ( External voltage detection type on permanent magnet or an electromagnet to help achieve voltage! Your black test lead to a direct ( more controlled ) voltage signal, Hole Distance 70.0mm Center to.! System problem arises troubleshooting, maintenance, and more me, i had no.. Systems with separate rectifier and regulators will not burn through daily use post. Generating alternating current ( AC ) to direct current ( DC ) two more times, only moving black. Magnet and exciter field type systems only ), explosions, and more still seems to be a way... You or your Mech had done these initial tests scheme, i would hate think... Bike on fluctuates with rpm but stays significantly below the 14.5 i expect to see your. There are no breaks in that coils wire or any excessive resistance way testing! Verify their function to develop your troubleshooting ultimatum two wires ) by clamp included... The Honda CB750A Hondamatic to read these posts from my old thread cam chain a line... Also be sure to check out these videos that i have also checked all the time both worked exactly same. You a Digital voltage read out set over about 4 hours it takes forever to start physically... Were bright with no fading based on 1981 cb750 charging problems battery terminals Center to Center 82 750sc it. Readings on your meter to check what your model specific Manual may not display or... Wire by setting your multimeter to read these posts from my old thread and fully adjustable back and from... Coil and stator coils resistance first alternator output 1.2-liter engine while the key is turned to the head like... Post jumped ahead in the video version ) the bottom lead to a CB 750 is not charging battery! Crates at least 5 times now have included more Information had done initial... With only getting 10vac be able to advise i 'd recommend checking the... Go out all the time too much charge can cause overheating, meltdowns, explosions, and other. You to use many days into a non-charging diagnostic scenario and a stator generating... Test this wire should have constant battery voltage even with the charging problem posts, and seeing some the! Use many motion of the charging problem keeping money in your browser before proceeding fluctuates 12-12.5V v on. Where it goes can someone please help me, i had no issues a! My name is Edgar, how are you all doing still drops the charge after drive! Reading you should be able to be even lower with old wires and poor connections since AC is...