Yamaha Scorpio - Page 152

5 - 6
CARB
CARBURETOR
4.Inspect:
●
Piston valve
1
Cracks
→
Replace.
●
Rubber diaphragm
2
Tears
→
Replace.
●
Jet needle
3
Bend
→
Replace.
N
OTE:
If you suspect the piston valve has been dam-
aged, check the component for cracks by
pouring gasoline into the valve. If it leaks,
replace with a new piston valve.
5.Check:
●
Free movement
Insert the throttle valve into the carburetor
body, and check for free movement.
Stick
→
Replace.
6.Inspect:
●
Main jet
1
●
Needle jet
2
●
Pilot jet
3
●
Pilot screw
4
●
Pilot air jet
5
Bends/wear/damage
→
Replace.
Contamination
→
Blow out jets with a com-
pressed air.
7.Inspect:
●
Starter plunger assembly
1