jetting advice for tr270 kit

[00drzs]

Hello,

Have a Thumper Racing 270 kit going on the bike and looking for advice if you have this displacement.

This is where I am at now:

Stock

Opened airbox

Drilled difuser

42 pilot, 1 out

150 main, stock needle raised two grooves

New york/ NorthEast/Sea level

Thank you

[papawhiskey1]

My initial guess would be a 45-48 pilot, 155-165ish main, and appropriate needle clip position and fuel screw settings. There are plenty of posts on setting fuel screw. Needle position can best be determined by riding.

[papawhiskey1]

By the way , your stock needle can be shimmed up(but not down) by using appropriately sized washers under your clip.