4-10
ENG
CARBURETOR AND REED VALVE
EC464200
Needle valve
1. Inspect:
9
Needle valve
1
9
Valve seat
2
Grooved wear
a
→
Replace.
Dust
b
→
Clean.
NOTE:
Always replace the needle valve and valve seat
as a set.
EC464301
Throttle valve
1. Check:
9
Free movement
Stick
→
Repair or replace.
NOTE:
Insert the throttle valve
1
into the carburetor
body, and check for free movement.
EC464401
Jet needle
1. Inspect:
9
Jet needle
1
Bends/Wear
→
Replace.
9
Clip groove
Free play exists/Wear
→
Replace.
9
Clip position
Standard clip position:
No.3 Groove
2. Inspect:
9
Main jet
1
9
Main jet holder
2
9
Pilot jet
3
Contamination
→
Clean.
NOTE:
9
Use a petroleum based solvent for cleaning.
Blow out all passages and jets with com-
pressed air.
9
Never use a wire.
5NY-9-30-4A 5/23/01 8:40 PM Page 20
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