Hongdou CG125 Classic motorcycle: This is a copy of the Honda CG125. Runs well, but blows bulbs.?

Question

Blows bulbs at a rate of about two a week!!. I have checked the earthing and battery; both seem OK, but problem persists.
Can anyone advise on what might be the cause of this most irritating problem??

Answer 1

Normally you can attribute this to a bad regulato/ rectifier, or its ground wire, put a volt meter to the battery while its running, with a fully charged battery, you should have between 12.80 and 14.50 volts increase engine speed while testing to around 4,000 rpm if it climbs higher than 14.50, you probably have a regulator problem

Answer 2

6 volt system right? could be vibration or electrical, which bulbs, tail lamp? using LEDs with the appropriate resisitors could be a cure for everything except the headlamp but a pocket full of bulbs, could be the best bet. Do not fit 12volt bulbs to a 6 volt system as the filaments are thinner and weaker and much less capable of resisting vibration.
If there is an electrical fault I would expect the battery to boil and need lots of topping up., bigger battery is a good idea as is a zener diode but I have no idea where you would find a 6 (7.2?) volt diode.

Answer 3

Check for a inline fuse. If you have the wrong fuse in place it will blow the bulbs everytime. Sounds like you are getting too much current to the lights.

Answer 4

Could be cheap bulbs, try good quality ones. It could also be vibration or as others have said the regulator/rectifier.

Answer 5

Regulator, Rectifier, diode board maybe, you could also check for a faulty earth that could be arcing that would not help .

Answer 6

Faulty voltage regulator? Too high revs. outputting too high a voltage?

Answer 7

its a generator problem or regulator rectifier problem.