Adjusting The Carburetor - Yamaha YFM350RY Owner's Manual

1. Purging bolt
7. Start the engine and rev it up approximately
twenty times while momentarily creating ex-
haust system back pressure by blocking the
end of the muffler with a shop towel.
8. Stop the engine and allow the exhaust pipe to
cool.
9. Install the purging bolt and tighten it to the
specified torque.
Tightening torque:
Purging bolt:
27 Nm (2.7 m·kgf, 19 ft·lbf)
EWB02380
WARNING
Never run the engine in an enclosed area when
purging the spark arrester, otherwise it could
cause injury to the eyes, burns, carbon monox-
ide poisoning, possibly leading to death, and
start a fire.
G Always let the exhaust system cool prior to
touching exhaust components.
G
Always wear eye protection, and make sure
no one is behind the ATV.
G
Make sure there are no combustible materi-
als in the area.
EBU23940

Adjusting the carburetor

The carburetor should be checked and, if neces-
sary, adjusted at the intervals specified in the peri-
odic maintenance and lubrication chart. The
carburetor is an important part of the engine and
requires very sophisticated adjustment. Therefore,
most carburetor adjustments should be left to a
Yamaha dealer, who has the necessary profes-
sional knowledge and experience. The adjustment
8-19
8