Join Date: Nov 2020
Thanked 0 Times in 0 Posts
YFM250 Carb rebuild gone bad
My 2004 Yamaha Bear Tracker (yfm250) was not idling very well so I decide to rebuild the carburetor. took it apart, soaked it in carb solvent overnight and reassembled with a rebuild kit. Starts right up but runs like the throttle is wide open. It is not. The throttle mechanism is resting against the throttle adjustment screw or even its base if I back the screw out. I've taken it back apart and checked assembly against a diagram I found online. Everything seems in order, but it still roars when I start it. I am sure I've done something wrong, but not sure where else to look. Mixture adjustment screw is 2.5 turns out from bottom, but even if I turn it in or out while it is running it does not seem to affect it. Runs really good,just way, way to fast.
The kit did not include any new diaphragms.