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View Full Version : Instant Start.... bump start????!!!!!



stuntman_12
10-28-2006, 06:22 PM
I have the 42mm 450R carb.... My 416ex WILL NOT start by itself when it's cold. BUT!!!! When i have it pulled or bump started it instanly fires and runs? ....:confused:

It also back fires a good bit still. I have a dyno170 main, stock 48 pilot, a/f 3 turns out, and the needle on the third notch.

The throttle seems to "stick". It revs very quickly, then slowly settles back down to a kind of rough idle.

Any suggestions?????????????????????????????????

450rJam
10-28-2006, 08:07 PM
check compression.

rooster_20
10-28-2006, 11:03 PM
Your throttle cable could be messed up that could be the sticking part..