Checking The Reed Valve - Yamaha YZ85W1 Service Manual

CARBURETOR AND REED VALVE
7. Check:
8. Check:
9. Check:
10.Check:

CHECKING THE REED VALVE

1. Measure:
7-5
• jet needle
• main nozzle
• main jet
• main nozzle holder
• pilot jet
•
starter plunger
Bends / damage / wear → Replace.
Obstruction → Clean.
Blow out the jets with compressed air.
• piston valve movement
Insert the piston valve
tor body and move it up and down.
Tightness → Replace the piston valve.
• hose joints
Cracks / damage → Replace.
• carburetor breather hoses
• fuel hoses
Cracks / damage / wear → Replace.
Obstruction → Clean.
Blow out the hoses with compressed air.
• reed valve bending
Out of limit → Replace.
Reed valve bending limit
0.2 mm (0.008 in)
• valve stopper height
Out of specification → Replace.
Valve stopper height
7.4 ~ 7.8 mm (0.291 ~ 0.307 in)
CARB
into the carbure-