Why is the engine racing?

[tyler70t]

Tyler had to pull his kill switch @ the last race in moto 2 because he said the throttle was stuck. Well, I just got around to looking @ it. I checked the throttle assembly on the bars 7 it appears to be fine. I took the carb off and checked theslide & cable, they looked fine. Actually the little plastic piece the guides the slide had pushed out. I put it back, epoxied it in place from the outside and fired it up. It still is acting like the throttle is stuck open....... can't figure this out. It is a CR 85 motor in a Blaster frame.:confused: :confused: :confused: :confused:

[pmarra]

Ha jeff its sucking air

[chris p.]

gotta agree with pmarra.check the carb boot.one of my bikes would rev like crazy and thats what it was. also check that the throttle cable housing didnt pull out of the top of the carb.good luck. :D

[Thumpin440ex]

Yep, sure sounds like a air leak to me.


John

[coffing918]

JJs cobra did that at one track and it was the rubber boot had a rip in it,,!

[dewutfan]

had same issue this weekend and found that the bolts lossened up on muffler flange... but like there all saying your getting air from somewhere...

[tyler70t]

Thanks everyone, I will check the boot @ the carb if not i will bring it over Paul.................Jeff

[JIM GRACE]

Jeff you can spray carb cleaner around the intake while its running and see if the idle changes

[tyler70t]

Well, I took the carb off again and ensured the boot & where it connects to the airbox were sealed up tight and started it up. Looks like it's ready to go , thanks guys!:D ;)

[tyler70t]

Well, I took the carb off again and ensured the boot & where it connects to the airbox were sealed up tight and started it up. Looks like it's ready to go , thanks guys!:D ;)