I'm running 155/160 mains and the needles one position richer than stock with a sparks full system and no airbox lid. Runs great except for real high rpm. I'd like to know what jets other people with this same combination are using.

 

The easiest way to jet YOUR machine is a simple full throttle plug chop.

 

Might want to go a little higher, try a 162.5, 167.5 combo