high idle

sb bikes · #1 08-18-2008, 05:05 PM

my 80 cc chines bike idles high . has any one else had this problem? I've adj carb but no luck .

**Norman** · #2 08-18-2008, 05:35 PM

Is your throttle cable adjusted a little bit too tight? there should be some free play in the twist grip before the throttle responds about 1/8" of free play is good.

**Bikeguy Joe** · #3 08-18-2008, 06:23 PM

Check the carb to intake and intake to cylinder areas for leaks. Better yet, take them apart and seal them up with RTV on both sides.

Brains · #4 08-18-2008, 06:41 PM

I had the same issue with one of my bikes a while back & the remedy to it was exactly as Norman suggested, the cable did not have enough free play in it so every time I moved the handle bars left or right the engine statrted to rev higher & I couldnt get my revs down with the idle screw, gave the cable some slack & it fixed the problem instantly

Motoschwinn · #5 08-18-2008, 07:31 PM

So you would adjust that at the top of the carb I would guess?

misteright1_99 · #6 08-18-2008, 08:18 PM

Quote:

Originally Posted by Motoschwinn

So you would adjust that at the top of the carb I would guess?

I would just screw the cable adjuster IN a bit on top of the carb, or you could also adjust it at the throttle if it is not already screwed all the way in...

sb bikes · #7 08-20-2008, 07:22 AM

All hall Normam, thanks cable was adjusted too tight !! thanks again!!