Question about 1992 Honda CB 750 Nighthawk

1 Answer

Starts with fully charged batter ( new ) aournd 12.6 Volts. Ignition on, but engine off it reads 11.3 volts. With engine running at 2000 rpm, the read is 11.7 volts. The bike seems to **** the battery dry in a couple short drives. Obviously it is not charging sufficiently. The bike will die while driving along, no restart. What is my next move to diagnose/fix this problem? Thanks for any and all consideration.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 105 Answers

Needs statter or regulator , statter is on left side on the end of crank Mopar kenny

Posted on May 20, 2011

  • doorway84 May 20, 2011

    Thanks mopar kenny.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

How to check alternator output


with engine running you should be able to check alternator output on the battery. put your leads on the positive and negative post and see if it reads more then 12 volts DC. usually charges at 13-13.5 volts

Apr 24, 2016 | 2005 Suzuki Boulevard C90

1 Answer

How to check charging system on a kohler 17.5


This is an easy check if you have a cheap, simple volt meter. It's much better to have an old fashioned needle meter rather than a digital. The needle is more sensitive, much quicker, and makes a clearer diagnostic tool. But not to worry, for you fancy folks a digital still works (sometimes the results are not as clear).
  1. Set the meter to DC Volts.
  2. Attach the red and black leads of the meter to the positive and negative posts of the battery. Most modern day digital meters don't care if the polarity is correct or not. However, if you have a needle meter, best to put the positive of the battery with the red wire of the meter; otherwise the needle will not be happy with you.
  3. Note voltage. It should read near13 volts if the battery is good and fully charged. If it reads below 12 volts it needs charged or it has bad cells. If after charging a few hours, the voltage is still below 12 volts then the cells are bad, replace it.
  4. Turn the key to crank the engine while keeping your eyes on the meter. Whether the engine cranks or not, the meter should not fall much below 11 Volts. If it falls below 10 volts or worse yet below 9 volts, the battery has a bad cell or two. Replace the battery, charge it, and repeat the test.
  5. If the engine starts, rev it up and watch the meter.
    1. If the charging system is working the voltage on the meter should quickly rise above 13 or 14 volts.
    2. If it rises up strongly towards the 14 volt range this indicates the charging system of the machine is working.
    3. If it plays around down near 12 volts you are reading the recovered voltage of a good battery, but the charging system is not working.
    4. If it simply stays below 11 volts, the battery and the charging system are both suspect. Replace the battery first. Fully charge it, and then repeat the tests before worrying about the charging system.
Note:if the battery falls below 9 volts the fuel cut off, a black cylinder on the bottom of the carburetor (if your model has this), will cut off the gas supply to the carburetor.

Mar 15, 2015 | Garden

2 Answers

My generac generator wont start,making a clicking noise and battery is fully charged


Have somone hold the start button while you measure the voltage across the battery. If it is less than 11 volts, then the battery is bad.

Sep 14, 2014 | Generac Electrical Supplies

1 Answer

Locating the starter relay on a 95 Ultra Classic(carbureted)


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12 volts or better after charging.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor. Good luck

Jan 14, 2014 | Harley Davidson Motorcycles

1 Answer

Charging system failure low voltage


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12 volts or better after charging.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor. Good luck

Jan 07, 2014 | 2011 Harley Davidson FLHTK Electra Glide...

1 Answer

Starter switch


Batteries are checked with a load tester not a voltmeter as you will read 12 volts with a dead cell. Also a fully charged batter should read 13.2 volts and not 12 volts as each cell generates 1.2 volts not 1 volt.

Aug 18, 2013 | Honda CRF 230 F Motorcycles

2 Answers

My car keeps dying out, could it be the battery or alternator?


unlikely, if it starts the battery is good because it just started the car and the alternator is good because it charged the battery the prior time it was running. i would put some thought into a fuel supply problem, such as the pressure falling off rapidly after a start; or something getting hot in the ignition systrem and failing causing a loss of spark.

Jul 25, 2011 | 1993 Ford Probe

1 Answer

I have a 2001 flhtcui what are the ac reading coming from stator at 2.5k rpm 3k rpm and 3600 rpm. At 2000 rpm I get about 12 volts dash guage reading but at 3000 I get 13.5 to 14 at lower rpm 2000 or so I...


The AC output of the stator should be 32-40 volts at 2000 RPM (16-20 per 1000 RPM). With the battery fully charged, your regulator should supply between 13.5 and 15.0 DC volts to the battery. This should be the reading you get on your voltmeter. It will vary depending on what lights and other equipment you have turned on. Sounds like everything is working fine to me. The gauge is reading the DC voltage at the battery while the engine is running. At 2000 RPM, 12 volts is a little low but, considering the accuracy of the gauge, as long as it doesn't fall below 12 volts, it's about right. You don't ride for extended periods at engine RPMs that low. Then at 3000 RPM, 14 volts is about right. If your bike never ran anymore than 12 volts, your battery would slowly go down. If it goes any higher than 15.0 volts, it will boil the battery. Usually, about 14.3 or so with no load on the system is about right.

Good Luck
Steve

May 17, 2011 | 2001 Harley Davidson FLHTCUI Electra Glide...

2 Answers

Battery not charging


Check in front of the motor to make sure the plug hasn't pulled out from the block. Common issue if it has had seal broken from factory, usually in lower left front, goes to your charging system

Apr 09, 2009 | Harley Davidson Harley-Davidson Motorcycle...

Not finding what you are looking for?
1992 Honda CB 750 Nighthawk Logo

Related Topics:

142 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4535 Answers

yadayada
yadayada

Level 3 Expert

76630 Answers

bazzz7071
bazzz7071

Level 2 Expert

342 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...