Adjusting The Carburetor - Yamaha YFM350R Owner's Manual

1. Purging bolt
2. Gasket
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. Check the gasket for damage, and replace it if
necessary.
10. Install the gasket and the purging bolt, and
then tighten the bolt to the specified torque.
Tightening torque:
Purging bolt:
2
1
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.
●
Always let the exhaust system cool prior to
touching exhaust components.
●
Always wear eye protection, and make sure
no one is behind the ATV.
● 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
8-20
27 Nm (2.7 m·kgf, 20 ft·lbf)
8