Yamaha TT-R90(V) Owner's Service Manual page 206

CARBURETOR
EC464600
Float
1. Inspect:
• Float 1
Damage → Replace.
ASSEMBLY AND INSTALLATION
Carburetor
1. Install:
• Pilot air screw 1
Note the following installation points:
• Screw in the pilot air screw until it is lightly
seated.
• Back out it by the specified number of
turns.
Pilot air screw:
1-3/4 turns out
2. Install:
• Throttle valve 1
• Starter plunger 2
NOTE:
Align the slit a of the throttle valve with the tab
b of the carburetor top.
FUEL LEVEL ADJUSTMENT
WARNING
Gasoline (fuel) and its vapors are highly
flammable and explosive. Keep away from
sparks, cigarettes, flames or other sources
of ignition.
4 - 6
ENG