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Up or down on the main jet?

I'm playing with a 92 Yamaha Big Bear 350. At full throttle it kind of stutters and won't rev through it. Lacks Power etc. I can pull the choke while running WOT and it seems to run better and will accelerate. If I come to a stop with the choke on it will die. I tried moving the clip up 1 to...

I swapped out the APV servo and it took off and ran great. I swapped the old one back in to confirm and it went right back to running poorly. I have ordered a new servo motor. Just didn't want this to be another dead end thread like I ran into many many times while researching this problem. TB

Pulled the reeds they look good. Spark plugs are cardboard colored if that matters. I'm really thinking stator does anyone have the test procedure????? TB

power valves move freely and have been cleaned "recently".

02 MT Cat 800 144 EFI, 2800 miles. Starts and idles great. When you get up to speed (around 5500 rpms) it will surge approximately 200 rpms. The surge gets more pronounced and rapid the faster you go. Once warmed up it seems to be worse and under a more severe load (going up a hill) it has...

Recently bought a 1992 yamaha big bear and licensed it for street legal use here in MT. It currently has a tail light but no brake light. The rear hand brake has two wires coming out of it wondering what they are for if I can use them to activate a brake light? Anyone put together their own...