Jetting Question Please Help!!!!

[BigBlasterd]

I just put a 240 kit on by vitos and i didnt put in the new jets. My carb was set up for .80 over with a pipe (fmf) and it runs good and strong. IDK what to do or how to know if im running to lean. I really dont want to rebuild the rest of this year. What do i do and how do i read a plug chop!!!!!

 

[sicivicdude]

go back out to the "engine" section and go up to the sticky labeled "Yamaha engine, everything you need to know ~most useful posts~" It has the directions for how to do a plug chop in that thread.

 

[BigBlasterd]

what jet size should i use to then for all the jets

 

[98blasterworked]

read the plug chop guide.... and go accordingly... rich means smaller jets (i.e. too much gas for the amount of air) and lean means the exact opposite.... also u might wanna check out the carb tuning guide in that sticky