Yamaha YFM400FAR, Service Manual

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CARB
CARBURETOR
8.Check:
●
Free movement (piston valve)
Sticks
→
Replace the piston valve guide and
the piston valve.
Insert the piston valve into the carburetor
body, and check for free movement.
9.Check:
●
Free movement (throttle valve)
Sticks
→
Replace.
ASSEMBLING THE CARBURETOR
CAUTION:
Before reassembling, wash all of the parts
in a clean petroleum-based solvent.
1.Measure:
●
Float height
a
Out of specification
→
Adjust.
*****************************************************
Measurement and adjustment steps:
●
Hold the carburetor in an upside down
position.
●
Measure the distance from the mating
surface of the float chamber (gasket
removed) to the top of the float.
NOTE:
The float arm should be resting on the needle
valve, but not compressing it.
●
If the float height is not within the
specification, check the valve seat and
needle valve.
Float height (F.H.):
13 mm (0.51 in)