Yamaha WR426F 2001 Manuel D'atelier page 262

DECOMPRESSION LEVER ADJUSTMENT/
AIR FILTER CLEANING
DECOMPRESSION LEVER ADJUSTMENT
1. Check:
Decompression lever free play
G
Checking steps:
Remove the timing plug.
G
Turn the crankshaft counterclockwise to
G
align the T.D.C. mark a on the rotor with
the align mark b on the crankcase cover
when piston is at T.D.C. on compression
stroke.
Check the free play c.
G
Free play:
5 ~ 9 mm (0.20 ~ 0.35 in)
2. Adjust:
Decompression lever free play
G
Adjustment steps:
Loosen the locknut 1.
G
Turn the adjuster 2 in or out until the
G
adjustment is suitable.
Tighten the locknut.
G
CAUTION:
After the adjustment, start the engine
and make sure that the engine does not
stop when the handlebars are turned
fully both ways. If the decompression
cable is too tense, the engine will stop by
the decompression system.
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.
3 - 12
INSP
ADJ