How do you know how far to screw the screw to start it. Created by anonymous. Motorcycles - Factory bike - Chrono SM 250 - 2005 Factory bike Chrono SM 250

Py90 carb timming screw

February 2021 1 17 Report

Py90 carb timming screw

How do you know how far to screw the screw to start it

Motorcycles - Factory bike - Chrono SM 250 - 2005 Factory bike Chrono SM 250

I presume you mean the air bleed jet. If so screw it in GENTLY till bottomed out then unscrew 1.5 - 2 turns. Adjust when warmed up.

Back off screw till there is a tiny gap, then trim in 2-3 turns, adjust after warming up.