Ok so maybe you guys can help me out I checked old posts and couldn't find much that would help me in my situation. 91 250r running closed airbox k&n with outerwears v force 3 .40 over piston coolhead with 22cc dome stock porting an full fmf system. Stock carb with 32.5 pilot which I'm gonna bump up to a 35 (slight bottom end hesitation) 280 main and needle on middle clip. I want to run the lid open but I'm having trouble with my plug chops seems to me I'm lean and I can only do it in fourth no room for 5 or 6. Really want to run open lid but scared of going lean and melting a piston. Everything i listed is brand new so no worn out parts for sure. Temp right now is about 40 and I'm right at sea level. What's a good starting point for me to run open lid. Thanks in advance guys
Oh yea running 32:1 with 93 octane and maxima super m
i would go 1 size bigger for the air box lid, and maybe 2 for the temp, its better to be rich then lean.
make sure you go bigger on both jets though
Ok so 300 or 310 should be perfect
should put you in the range. you might have a ruff time getting it started at first.
your gonna have to turn air screw to
She starts fairly easy even in the cold right now although first time I started her since early September and I had to drop the idle so I figured I need to richen the main. But thanks for a ball park range I'm gonna take the lid off and start at a 310. And I'll mess with the air screw too. Thanks a lot again I've been having a hard time with the main