Yamaha VMX12 2001 Service Manual page 268

CARBURETORS
EAS00488
ASSEMBLING THE CARBURETORS
The following procedure applies to all of the
carburetors.
CAUTION:
@
• Before assembling the carburetors, wash
all of the parts in a petroleum-based sol-
vent.
• Always use a new gasket.
@
1. Install:
• O-ring
New
• washer
• pilot screw spring
• pilot screw 1
Pilot screw setting
2-1/2 turns out
2. Install:
• gasket 1
• O-ring 2
• needle jet 3
• jet block 4
NOTE:
Align the slot a on the needle jet with the pro-
jection b on the jet block.
3. Install:
• piston valve 1
• jet needle kit
• jet needle holder
• piston valve spring
• vacuum chamber cover 2
NOTE:
@
• Install the end of the piston valve spring onto
the spring guide on the vacuum chamber
cover.
• Align the tab a on the piston valve dia-
phragm with the recess b in the carburetor
body.
@
6 - 8
CARB