2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 80Get this manual
FUEL SYSTEM Tighten the carburetor topAfter installing the carburetor, check for the following: Throttle lever free play (page 3-4) Engine idle speed (page 3-13) Air screw adjustment (page 5-1 6)
AIR SCREW ADJUSTMENT
IDLE DROP PROCEDURE
The air screw is factory pre-set and no adjustment is necessary unless the air screw is replaced The engine must be warm for accurate adjustment10 minutes of stop-and-go riding is suffi cient Use tachometer with graduations of 50 rpm (min'or smaller that will accurately indicate 50 rpm (minlchangeDamage 10 rhe alf
screw seat Will