My 2005 YFZ will start and idle fine (thank goodness, it's been almost 18 months and a lot of $$$ to get it back together). It'll idle fine till I revv it up a little, then it gets stuck at high idle. We thought that it was the slide sticking, so we took the carb off of the air box and the cylinder, and tried to get the slide stuck by pumping the throttle. The slide wouldn't get stuck anywhere, moved smooth as butter. I took the top cap off of the carb anyway and doused it with carb cleaner while working the throttle back and fourth.
I put everything back together, and it still idles high as soon as I give it some throttle, if I leave it alone, it's fine till I stop again, then it idles high. The only way to get it to not idle high like that is to put it in gear, and let the clutch out slowly, then pull it back in after it starts to roll a little bit. Then it idles low like it should, till I go for a ride and stop, or revv the motor a little bit.
My friend that was helping me turned the black spoked screw on the back of the carb when we were trying to get the thing started. I'm wondering if that isn't my problem. Should I get it started, let it idle high, and mess with that mixture screw till the idle kicks back down?
Blue 2005 YFZ 450
DG Alloy Nerf Bars
Pro Design kill switch
Hot Rods Stroker Crank
Wiseco 13.5:1 High Compression Piston
Trail Tech +2oz flywheel
Hot Cams Exhaust Cam
GYTR Kick Start w/1997 YZ 250 Kick Start Lever
White Bros. First Generation E-Series Slip-On Exhaust
Gibson Steering Stabilizer
Razr MX tires all around
So much motor on my hands, so little time to smoke my friends!