Yamaha TZ250M1 Owner's Service Manual page 109

CARBURETOR AND REED VALVE
EC464200
Needle valve
1. Inspect:
NOTE:
Always replace the needle valve and valve
seat as a set.
EC464301
Throttle valve
1. Check:
NOTE:
Insert the throttle valve 1 into the carburetor
body, and check for free movement.
EC464420
Jet needle
1. Inspect:
EC464801
FUEL LEVEL
1. Measure:
c
4-11
• Needle valve 1
• Valve seat 2
Grooved wear a ≥ Replace.
Dust b ≥ Clean.
• Free movement
Stick ≥ Repair or replace.
• Jet needle 1
Bends/Wear ≥ Replace.
• Clip groove
Free play exists/Wear ≥ Replace.
• Fuel level a
Out of specification ≥ Adjust.
Fuel level:
6.0~7.0 mm (0.24~0.28 in)
Above the float chamber mating
surface
Measurement and adjustment steps:
• Remove the drain plug.
• Connect the fuel level gauge adapter 2
and fuel level gauge 1 to the float cham-
ber.
≤
Fuel level gauge adapter:
YM-01470/90890-01470
Fuel level gauge:
YM-01312-A/90890-01312
ENG