Inside my stock carb of one of my '85 Honda ATC 250R's the needle is marked up..pretty much the middle section has almost what looks like white scorch marks. I cleaned the carb two days ago...sucker looks gorgeous..ran it that day and everything worked excellent. I take it out today and start drag racing practice...high gear racing over long stretches and I start getting bogging at the top of the high gears...say 3-5. I'm wondering...is it that stock needle hanging up or causing issues?...it's on the second clip from the top. Plug looks good though. I did notice that the warehouse where I kept the trike is between 80-90% humidity...I'm wondering if this is causing major issues with my 250r's. New K&N filter. I'm getting so frustrated. When I clean the carb I get excellence...then I let it sit for 2-7 days and then I get bogging. Am I missing something here?