apply brakes engine dies

ive just started riding my bike and i notice that when i apply brakes my engine wants to die. at nite when i use my signals my lights dim alot. my alt is charging. i cleaned starter. that helped alot on start! can i clean my alt.? any opinions on my problem?. thanks. new battery. cleaned all terminals, connections, etc...

 

sounds like a short in the wiring,start by disconnecting brake light.Then work your way through the wiring

 

engine only dies if i let it. if i give a few more rpms every thing is fine. only at idle is it a problem. a little gas and no prob.

 

At idle you are running on the battery. If applying the brake (and thus turning on the brake lights in addition to the headlight) makes the bike want to die, then your battery is not strong.

You said your alternator is charging. Did you test it with a meter to be sure it's charging fully? You should see 14.5V at the battery above 2500rpm.

The alternator brushes are located in the cover. Yes, the "guts" of the alternator could benefit from a cleaning; you may discover worn brushes or corroded leads and solve your problem.

 

thanx bigfitz. im gonna clean my alt today. will let evry one know the outcome

 

well my bike is great. found my prob. had a disconnected ground behind battery box. evrything good now. no horn though...

 

pull the clutch in
sorry dude, i just had to

 

haha, I was going to say that.

 

ok this will sound thick.. maybe I am missing it in the language.. which is typical.. or maybe I am having a blonde moment... but please.. explain the about.. about the clutch... I know its a joke but I am missing it!!!!

 

You need to Troubleshoot your Electrical OUTPUT.
The Battery needs to Charged.
Capable of handling the LOAD.

MEASURE the Alternator Output at the Battery.
You NEED:
9.5 -to- 11.0 Volts when the Starter is Cranking.
Voltage rising to:
13.8 -to- 14.2 Volts at 1,875 rpm's
14.0 -to- 14.2 Volts approaching 2,000 rpm's
14.2 > Steady -or- 14.2+ (to 14.2(3,4,5) Tops at 2K and above.

Above 14.5 rpm's indicates a problem.

Check your Alternator Brushes.
Minimum Length 10mm's.
Shorter than 10mm's requires replacement of the Brushes.

 

you're having a major bonde moment, i hope


so one a manual motorcycle you have a clutch which engages and disengages the engine from the drive train, which you control, so say if you're trying to stop, you let the rpms lower, and you then apply the brake without pulling it in, it will stall, because there is no slippage or device that will let the engine still turn while the clutch is engaged, so you are essentailly stoppping the motor...

 

good job schooter, explained like a first class engineering student

 

I cannot tell if the sarcasm is palpable or not...

 

no sarcasm intended dog, you got it goin on