high idle speed.

[MikeBike]

hi all
i got a trouble shooting question: when i pull on the cluch to disengage it, they idle speed shoot way high, is that normal? it doesnt seem normal.

 

[unraw]

Have you tried unscrewing the idle screw on the carb a bit? does this bring your idle down? Also, do you have a boost bottle? That makes it do that too.

Edit: Is this a happy time engine or a four stroke or what?

 

[misteright1_99]

Might also try the adjustment on top of the carby.....

 

[MikeBike]

its a 2 stroke "80cc", ive adjusted my screw a lot on my new carb, my old one the screw didnt do any thing.

 

[Technocyclist]

Have you checked for vacuum leaks?

 

[Bikeguy Joe]

Check for air leaks.
Turn the screw out (counter clock-wise) all the way until it is loose and see if that does anything.
Turn the brass piece IN in the top of the carb. until there is some slack in the housing.

 

[OSCAR383]

Air Leak Would Be My Guess

 

[thatsdax]

Sounds like a lean condition, either from an air leak or carb needle too low.

 

[Saddletramp1200]

Throttle cable well lubed? Kinked?

 

[Bikeguy Joe]

Does it die when you flip up the choke? If not, it's leaking air.

 

[OSCAR383]

I Just Read You Put On A New Carb Did You Instal The Cable Correctly If The Silver Disc Is Not In The Spring Return Will Not Work Properly And Could Leave The Throttle Open

 

[MikeBike]

WOW thank you for all the replys

Does it die when you flip up the choke? If not, it's leaking air.

yea its shuts down.

 

[MikeBike]

I Just Read You Put On A New Carb Did You Instal The Cable Correctly If The Silver Disc Is Not In The Spring Return Will Not Work Properly And Could Leave The Throttle Open

yea its in the right spot.

 

[MikeBike]

Sounds like a lean condition, either from an air leak or carb needle too low.

dax, i am going to do that when i get home, but that just might be it!

 

[MikeBike]

there was know difference from 2nd from the top and 3 from the top

 

[unraw]

sounds like an air leak. Try putting an o-ring in your carb. I o-ringed my carb and it made a big difference.