Yamaha WR250F Manuel D'atelier page 188

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AIR FILTER CLEANING
3 - 12
2. Adjust:
Decompression lever free play
Adjustment steps:
Loosen the locknut 1.
Turn the adjuster 2 in or out until the
adjustment is suitable.
Tighten the locknut.
CAUTION:
After the adjustment, start the engine
and make sure that the engine does not
stop when the handlebar is 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.
1. Remove:
Seat
2. Disconnect:
Taillight lead connectors 1
3. Remove:
Air filter case cover 2
4. Remove:
Fitting bolt 1
Washer 2
Air filter element 3
Air filter guide 4
INSP
ADJ