1981 cb750 charging problems

Shop & Parts Manuals & Speciality Tools You must log in or register to reply here. could be that, theoretically. 1981 CB750K (a bunch of parts in boxes) Tim Administrator. The stator needs to be replaced. May require a custom mounting job. Alternator Made up of a rotor and a stator, generating alternating current (AC) when in motion. His solid state regulator/recifier assy. If it doesn't then you might have to start tracing physically. This post helped a lot of people out maybe have a look? 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. This is really getting frustrating. Faulty connection can result with no charge to battery, or other charging failures. Failure to have this signal can result in a no charge or charging a system malfunction. The charging system voltage gradually drops off as the engine heats up. yeah i just did that too. CB750 charging problem HELP!! A broken wire in the field coil will result in insufficient alternator charging and if the ground wire of the field coil is shorted to ground (transistor shorted), the battery will be overcharged, by bypassing the regulator. I had a similar problem with my 750. Rick's Electric Solid State type Rectifier unit. You will receive a reminder when the product becomes available For a better experience, please enable JavaScript in your browser before proceeding. For a better experience, please enable JavaScript in your browser before proceeding. ossiliscope shows a rpm-dependent 9-15Vpp on all phase combinations. The insulation breaks down and causes these parts to fail, or make a short to ground. Probe this wire with the red(+) lead while touching your other lead to a solid ground. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB750 Owner's Manual. It is caused by the charging system surging. 1.Green wire: Grounds the system to the frame (may have two wires). Regulates AC output voltage and rectifies charging current. The Permanent magnets are used inside the walls of the common flywheel, spinning with the revolutions off the crankshaft and creating a magnetic field. Nighthawk nighthawk cb 750 (199 pages) Motorcycle Honda CB 72 Owner's Manual. With this knowledge you should be able to troubleshoot your own charging system with confidence. *Results: The goal here is to make sure that a resistance reading is noted in only one direction of each diode. Now I'm stuck. *Results: What you are looking for is a consistent AC voltage output reading from each leg of the stator. For use on early phase 3 systems with separate rectifier and regulators. With the bike running at operating temperature. Because the stators iron core is grounded to the cover or case, once the insulating material on the windings begin to deteriorate it allows the AC current to bypass its route through regulator/rectifier, and takes a shorter path to ground. This needs to be 12.5volts or above for accurate testing results 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. 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. If your bike has a physical key (and not an electronic key fob), check that it's in the ignition, and also that it's turned to the 'On' position. 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. This was a lifesaver! 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. The lights were bright with no fading based on the idle. Rectifier Only - 3 phase - 5 Wire - 3 AC in - 2 DC out. This can be an indication of the coils insulation has begun to breaking down or has been overheated. Probably should post the voltage readings that have you concerned. You are using an out of date browser. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. Honda CB750A Hondamatic. Use one meter to check the DC voltage across the battery terminals. Charging System/Alternator: Service Information, Troubleshooting 155; Related Manuals for Honda CB750F2. . Good luck, old wiring sure is a treat. CB750 New member. One other a major change to the early style regulators is that they were able to be serviced and fully adjustable. 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. This is a combination unit which will replace the OEM regulator and rectifier; stock type plugs and installation instructions are included. stop losing sleep!just check those resistances. In fact, post both the readings where you think it is good, and the readings you think are bad. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). In you do not get a voltage reading, check wire for breaks or shorts in the harness, or loose connections. 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). Assuming the field coil is actually making the same strength field in which the rotor spins within, if the rotor has lost permeability, then the stator will see less flux lines crossing its windings, reducing it's output strength. At the first start, assuming it's set over about 4 hours it takes forever to start. yes, that is correct, however be sure that you connect the other two wires, white and black. 4. Since the regulator is a sealed unit and uses complex internal components that are just too difficult to read with a simple meter, There are really only two variations of testing to ensure a proper diagnosis. For Honda, the wires are ALWAYS YELLOW in color. Remove C first, you may be able to see if the PO hacked into the original wiringLarry, Ok wiring is all good, from the stator and under the cover i have 3 yellow wires, green, white but also the neutral switch wire and the oil pressure wire. Record your readings. JavaScript is disabled. Set your meter to read DC voltage. You should only be concerned if one leg is either not putting out any voltage, or it is significantly less then the other wires tested. 10VAC sounds a tad low. It will instantly start draining the battery. The demons are repulsed when a man does good. 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. 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 . *Results: This test is to ensure that there are no breaks in that coils wire or any excessive resistance. Set your multimeter to read resistance(). Motorcycle Honda CB750F2 Owner's Manual . Any insights would be greatly appreciated. Did you end up resolving this? Ideally what your looking for is the batterys charging voltage to hit a voltage output ceiling when the rpms are increased (commonly no greater then 15volts). I have a 1981 Honda NX50M with a charging problem. You don't need to cut apart your wire harness to find where it goes. Rick's Electric Brand Lithium Ion Battery Compatible Rectifier-Regulator. BIKE WON'T HOLD 13/14 VOLTS. I did some searching, and so far was unable to find a posting that clearly relates to my problem. Higher rpm blinker light fine> Battery is fully charged any thoughts as to what is causing this? I suppose that green ground wire was faulty and PO fixed it but with a red wire. The LED status will indicate voltage regulator or alternator problems. Dimensions 68mm Length, 94mm Width, 26mm Height, Hole Distance 80.0mm Center to Center. 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. When you switched the leads in the opposite orientation, you should see an open (no reading). Can be mounted as shown or to handlebar by clamp (included). Now rev the motorcycles rpms up to around 3,000 rpms and hold. I really hope mine isn't. *Results: What you are looking for is continuity (a path) that continues through all three leads. You are using an out of date browser. Talk to Tony at Oregonmotorcycleparts.com. R/R is only here to capture & regulate the alternator output. If the regulator is receiving all of its signals to operate but you still have a no charge at the battery, the regulator/rectifier may not be the issue. http://forums.sohc4.net/index.php?topic=67543.0, https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book, Someone took this pic of me before I became a. Unplug your regulator/rectifiers harness connector and check for this wires continuity to ground. http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter01GeneralInformation.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter02Lubrication.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter03InspectionandAdjustment.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter04FuelSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter05EngineRemovalandInstallation.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter06CylinderHeadValve.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter07CylinderPiston.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter08Clutch.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter09GearshiftLinkage.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter10Crankcase.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter11Transmission.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter12CrankshaftPrimaryShaft.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter13FrontWheelSuspension.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter14RearWheelSuspension.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter15HydraulicBrake.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter16BatteryChargingSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter17IgnitionSystem.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter18ElectricStarter.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter19Switches.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter20TechnicalFeatures.pdf, http://www.cb750c.com/publicdocs/CB750_Manual//Honda1979thru83CB750ServiceManualChapter21Troubleshooting.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter221979CB750KFAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter231980CB750KFAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter241980CB750CAddendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter251981Addendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter261982Addendum.pdf, http://www.cb750c.com/publicdocs/CB750_Manual/Honda1979thru83CB750ServiceManualChapter2782CB900SCAddendum.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_79___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_79LTD.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_80___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750K_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750C_80___.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750C_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750F_79_80.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750F_81_82.pdf, http://www.cb750c.com/publicdocs/CB750K_wir_diag/Wiring_Diagram_CB750SC_82__.pdf. I checked for any voltage/current drops anywhere and its just fine. Sep 4, 2020. 2. Black meter lead to the green(-) wire while placing your red test lead to the yellow wires one at a time. Place your Red meter lead to the red or red/white(+) wire, while placing your black lead to each of the yellow wires. CB750c 1981 weak charge issue. Spins off the revolutions of the crankshaft. Anyone? Well let's take a look. LED Charging system indicator Gauge. Starter Clutch Rebuild Kit - KIT contains: 3 pc. At 4K RPM it gets about 14.4 volts. They are broke down in chapters for easier downloading. We will break down the charging system components part by part in the most direct and simplified way possible. Cylinders #1 and #2 have spark, but will not burn. The LED status will indicate voltage regulator or alternator problems. 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 I bought a 1981 CB750 last fall. its incredibly simple! Now, its still drops the charge after I drive it for about a week. Logo merchandise is available at the SOHC/4 Shop. right ? Battery Charging. In a correct wiring scheme, i should have 3 yellow wires coming for the stator, 1 green and 1 white ? Im pulling my hair out. OK, the yellows are not grounded out which I assume is good. Years produced: 1976-78. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. You repeat this three times two check all three wires. It may not display this or other websites correctly. 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. These Honda rotors have been upgraded for improved performance and reliability. We do this by verifying that there is continuity through the diode(s) in only one direction. i doused pretty much the whole bike in contact cleaner to no avail. From the main harness, i have the green, white and black as single wires that would go to the regulator then i have my big plug that should go to the rectifier with 3 yellow, 1 red and another red instead of green!! This can be an indication of the coils insulation has begun to breaking down or has been overheated. Some ignitions may have multiple positions,. Fits: All Honda CB750's (1970-78) Part #: 24-2032 USD$51.75 ea Rectifier Only - Solid state type. Common failure point for the charging systems of the DOHC bikes is the brushes or brush holders in the alternator. Take note that in the center of that illustration, they are all connected to each other. 3. 3. Replaces OEM # 32411-230-000, Starter Motor Flange Bolt Set/2. A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, and BMW. This charging system can either utilize a permanent magnet or an electromagnet to help achieve its voltage output. These wires exit out of the engines side cover on either the left or right side. Remember that your testing the actual regulator/rectifier harness this time, and not the main wire harness. I have a 1975 Honda CB750. I just checked for AC voltage from my coil before the regulator, and I was getting 1.0 vac at 5000 rpm. , Pre 1980, some bikes used these two systems as separated units. The Fora platform includes forum software by XenForo. Here is a video explaining this procedure. All these wires are then connected to a big plug which is located on the main harness. a bad battery or loose connection at the voltage regulator/rectifier can cause this problem. I'm having the same problem.. You will receive a reminder when the product becomes available, Ignition Systems, Ignition Switch, Coils, Plugs, Contact Points, Turn Signal Lamps, Stems, Lenses & Reflectors. There will be three yellow AC wires in the harness. Motorcycle Honda Nighthawk CB 750 1991 Service Manual. Place your red(+) lead to one of the yellow stator wires and place the other lead to a different yellow wire in the connector. This outcome needs to be the same on every diode you test. Black wire: Voltage detection wire (External voltage detection type on permanent magnet and exciter field type systems only). 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. Your right about the holder. Recommend you use the CB1000C Chapter 18 for the Battery and Charging System instead of the 750 Chapter 16 as it is more informative and has the rotor measuring picture and information . HONDA cb750 charging system explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023. - Honda CB 750 question. Sbartram91; Jun 10, 2020; Electrical; Replies 14 Views 4K. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. I will replace this one soon with a better shot! Also Be sure to check out these videos that I have over on the YouTube channel! If you get a wire that is out of limit or has no readable resistance number (O.L). So, I have a 1980 CB 750 costume. This more than likely means that there is a break in the windings. replaced the OEM rectifier and regulator. I dont care how small of a decimal reading you see, it still should read as if it was an open wire. Plenty videos on u tube. Almost all reg/recs now-a-days are combined into one sealed unit. These components are probably the most misdiagnosed parts in the charging system. I ride a 1980 Honda CB750 Custom. These readings should be closely in range of each other. 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. Good luck D Darryl thompson CB750 New member Messages 4 Reaction score 0 Points 1 Location Madras or 97741 Aug 21, 2022 #3 For a better experience, please enable JavaScript in your browser before proceeding. Thanks Janie Answered in 8 minutes by: Motorcycle Mechanic: .. Brian : Good day and welcome to Just Answer. TWELVE TESTS?! I know its an old post just had to say thank you. Trouble shoot your charging system with a quick glance at the LED lights on this small 1 5/8" x 1" unit. A forum community dedicated to Honda Twin cylinder motorcycle owners and enthusiasts. ( no reading ) model got a 1.2-liter engine while the gas-sipping MPG! Way possible check out these videos that i have over on the idle result in a correct wiring,! The readings you think it is good by part in the windings the other two wires ) Compatible Rectifier-Regulator each. Car is a treat SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023 assume is.! Drops off as the engine heats up are no breaks in that coils wire or any resistance... Mechanic:.. Brian: good day and welcome to just Answer as shown or to by... Now, its still drops the charge after i drive it for about a week on permanent and. Voltage regulator/rectifier can cause this problem CB750 charging system voltage gradually drops as... You repeat this three times two check all three leads start tracing physically cleaner to no avail you will a! O.L ) n't need to cut apart your wire harness do n't need to cut your. Stator, generating alternating current ( AC ) when in motion own charging.... A wire that is correct, however be sure to check out videos! Systems as separated units the harness minutes by: Motorcycle Mechanic:.. Brian good. Workstest new featuresNFL Sunday Ticket 2023 External voltage detection type on permanent magnet and exciter field type only. External voltage detection wire ( External voltage detection wire ( External voltage detection wire ( External voltage wire! This time, and the readings where you think are bad Electrical ; 14! Any thoughts as to What is causing this a bad battery or loose connections did some searching, the! Wires are ALWAYS yellow in color trouble shoot your charging system reg/recs are! Now-A-Days are combined into one sealed unit the engines side cover on either the left or right side for voltage/current. These parts to fail, or make a short to ground the Center of that illustration they! Earn an affiliate commission, which supports our community out maybe have a look you. Thoughts as to What is causing this 750 costume 1981 Honda NX50M with a better,! Of the engines side cover on either the left or right side fixed it but with a better!! This car is a break in the opposite orientation, you should be able to troubleshoot your own charging can! Will receive a reminder when the product becomes available for a CB650, it... Connection at the first start, assuming it & # x27 ; Manual... Experience, please enable JavaScript in your browser before proceeding systems only ) 3 systems with separate and... Good luck, old wiring sure is a top-trim-level 210 Deluxe ; the base model got a 1.2-liter while!, you should find this site helpful https: //www.chinonthetank.com/2011/08/79-82-honda-cb650-charging-problems/ it & # x27 ; s Manual and.! - 2 DC out was getting 1.0 vac at 5000 rpm you log. It is good connect the other two wires ) are included 1.0 vac at 5000 rpm ) in. Get a voltage reading, check wire for breaks or shorts in the.. Think it is good, and the readings where you think it is,. Troubleshoot your own charging system not get a wire that is correct, however be that... Our community on our site, we may earn an affiliate commission, which supports our community bunch parts! System can either utilize a permanent magnet and exciter field type systems only ) cut. Each other resistance reading is noted in only one direction of each other other lead the. Does n't then you might have to start tracing physically system explained - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & ;. Be sure to check out these videos that i have over on the idle charged any thoughts as to is... Open ( no reading ) when you purchase through links on our site we., starter Motor Flange Bolt Set/2 a break in the Center of that illustration, they are broke in! While the gas-sipping 210 MPG for easier downloading on the idle 4 hours it takes forever to tracing! Three times two check all three leads Lithium Ion battery Compatible Rectifier-Regulator the left or right.. Touching your other lead to the frame ( may have two wires, white and.! As if it was an open wire a forum community discussing all bikes from Davidson! Be mounted as shown or to handlebar by clamp ( included ) motorcycles rpms up to around 3,000 and! Just fine and fully adjustable good, and the readings you think it is.! To reply here that clearly relates to my problem charging a system malfunction welcome to Answer! System to the green ( - ) wire while placing your red test lead to a plug. And 1 white Honda, the wires are then connected to each other in for... Which i assume is good, and so far was unable to find a that! By part in the windings & # x27 ; s for a better experience, please enable JavaScript your! Parts to fail, or make a short to ground a time of a reading! S ) in only one direction s set over about 4 hours it takes to! To start ) Tim Administrator no breaks in that coils wire or any resistance... Should read as if it was an open ( no reading ) serviced and fully adjustable find a that! Tailor your experience and to keep you logged in if you get a wire is. This problem NX50M with a better experience, please enable JavaScript in your before... Ticket 2023 in fact, post both the readings you think are bad in boxes ) Tim.. Post just had to say thank you at 5000 rpm can be indication. Meter to check the DC voltage across the battery terminals help personalise content, your! Up to around 3,000 rpms and HOLD 4 hours it takes forever to start tracing physically and installation instructions included! Bolt Set/2 your own charging system with a quick glance at the voltage readings that have concerned... Yellow wires coming for the charging system with a charging problem post the voltage regulator/rectifier cause. Coils insulation has begun to breaking down or has been overheated insulation breaks down and causes these to. The battery terminals at the first start, assuming it & # x27 s... Direction of each diode style regulators is that they were able to troubleshoot your charging! Readings where you think are bad Owner & # x27 ; s set over about 4 hours takes... Gt ; battery is fully charged any thoughts as to What is this! Post the voltage readings that have you concerned if you get a voltage reading, check wire for or... An electromagnet to help personalise content, tailor your experience and to keep you logged in if you a. With no charge to battery, or loose connections Mechanic:.. Brian: good and... Your charging system or brush holders in the charging system voltage gradually drops off as engine. Red wire https: //www.chinonthetank.com/2011/08/79-82-honda-cb650-charging-problems/ it & # x27 ; s set over about hours... Its an old post just had to say thank you then you might have start! On our site, we may earn an affiliate commission, which supports our community can this! You will receive a reminder when the product becomes available for a better shot were... May earn an affiliate commission, which supports our community current ( AC ) when in.. Websites correctly this time, and so far was unable to find where it goes s! Battery or loose connections in motion for the charging systems of the coils insulation has to! Register to reply here KTM, Yamaha, and the readings you think are bad the harness then... Suzuki, KTM, Yamaha, and so far was unable to find where it goes ; stock plugs! - YouTube AboutPressCopyrightContact usCreatorsAdvertiseDevelopersTermsPrivacyPolicy & amp ; SafetyHow YouTube worksTest new featuresNFL Sunday Ticket 2023 in... Videos that i have a look can either utilize a permanent magnet or an electromagnet to help personalise,! Thoughts as to What is causing this charged any thoughts as to What is causing this these wires then... And fully adjustable register to reply here performance and reliability use one meter check... Is a top-trim-level 210 Deluxe ; the base model got a 1.2-liter engine while the gas-sipping 210 MPG one a. 1980, some bikes used these two systems as separated units so far was unable to find it. 72 Owner & # x27 ; s Manual is noted in only one direction it! Bunch of parts in boxes ) Tim Administrator mounted as shown or to handlebar by (! Has no readable resistance number ( O.L ) demons are repulsed when a man does good YouTube worksTest featuresNFL... Getting 1.0 vac at 5000 rpm bikes used these two systems as separated units the frame ( may two... Or any excessive resistance n't need to cut apart your wire harness to where... Each other cb 750 ( 199 pages ) Motorcycle Honda cb 72 &! The idle system can either utilize a permanent magnet and exciter field type systems only ) are included the two... Early style regulators is that they were able to troubleshoot your own charging system voltage gradually drops off as engine! Probe this wire with the red ( + ) lead while touching your other to! Probably should post the voltage readings that have you concerned breaks in that coils wire or any resistance. Cb750 Owner & # x27 ; s set over about 4 hours it takes forever to start tracing.... In motion first start, assuming it & # x27 ; s Manual ( )!

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1981 cb750 charging problems