CARBURETOR
6-7
8. Check:
• Jet needle “1”
Bends/wear/damage
→
Replace.
• Clip groove
Free play/wear
→
Replace.
9. Check:
• Main jet “1”
• Pilot jet “2”
• Needle jet “3”
• Needle jet holder “4”
• Starter jet “5”
• Coasting enricher jet (P. A. J. 2) “6”
Bends/damage/wear
→
Replace.
Obstruction
→
Clean.
Blow out the jets with compressed air.
10. Check:
• Piston valve movement
Insert the piston valve into the carburetor
body and move it up and down.
Tightness
→
Replace the piston valve.
• Throttle valve movement
Sticks
→
Replace.
11. Check:
• Starter plunger
• Starter plunger spring
Bends/cracks/damage
→
Replace.
12. Check:
• Hose joints
Cracks/damage
→
Replace.
13. Check:
• Air vent hose
• Fuel hose
• Drain hose
Cracks/damage/wear
→
Replace.
Obstruction
→
Clean.
Blow out the hoses with compressed air.
EAS26800
ASSEMBLING THE CARBURETOR
ECA14110
• Before assembling the carburetor, wash
all of the parts in a petroleum-based sol-
vent.
• Always use a new gasket.
1. Measure:
• Float height “a”
Out of specification
→
Adjust.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Hold the carburetor in an upside down
position.
b. Measure the distance from the front mating
surface of the float chamber (gasket
removed) to the top of the float.
TIP
The float arm should be resting on the needle
valve, but not compressing it.
Float height
13.0 mm (0.51 in)
Summary of Contents for 2009 YFM25RY
Page 1: ...SERVICE MANUAL YFM25RY YFM25RSEY YFM25RSE2Y 4D3 28197 11 LIT 11616 22 09 2009 ...
Page 8: ......
Page 39: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 20 ...
Page 42: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 EAS20410 LUBRICATION DIAGRAMS ...
Page 44: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 ...
Page 46: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Page 47: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 28 1 Oil cooler 2 Oil hose 1 3 Oil hose 2 ...
Page 48: ...CABLE ROUTING 2 29 EAS20430 CABLE ROUTING ...
Page 50: ...CABLE ROUTING 2 31 ...
Page 52: ...CABLE ROUTING 2 33 ...
Page 54: ...CABLE ROUTING 2 35 ...
Page 56: ...CABLE ROUTING 2 37 ...
Page 58: ...CABLE ROUTING 2 39 ...
Page 60: ...CABLE ROUTING 2 41 ...
Page 62: ...CABLE ROUTING 2 43 ...
Page 65: ......
Page 143: ...HANDLEBAR 4 42 Throttle cable free play 2 0 4 0 mm 0 08 0 16 in ...
Page 162: ...CHAIN DRIVE 4 61 ...
Page 165: ......
Page 240: ...CARBURETOR 6 9 ...
Page 242: ...IGNITION SYSTEM 7 1 EAS27090 IGNITION SYSTEM EAS27100 CIRCUIT DIAGRAM ...
Page 246: ...ELECTRIC STARTING SYSTEM 7 5 EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM ...
Page 252: ...CHARGING SYSTEM 7 11 EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM ...
Page 255: ...CHARGING SYSTEM 7 14 ...
Page 256: ...LIGHTING SYSTEM 7 15 EAS27240 LIGHTING SYSTEM EAS27250 CIRCUIT DIAGRAM ...
Page 260: ...SIGNALING SYSTEM 7 19 EAS27270 SIGNALING SYSTEM EAS27280 CIRCUIT DIAGRAM ...
Page 264: ...CARBURETOR HEATING SYSTEM 7 23 EAS27490 CARBURETOR HEATING SYSTEM EAS27500 CIRCUIT DIAGRAM ...
Page 267: ...CARBURETOR HEATING SYSTEM 7 26 ...
Page 268: ...ELECTRICAL COMPONENTS 7 27 EAS27972 ELECTRICAL COMPONENTS ...
Page 270: ...ELECTRICAL COMPONENTS 7 29 EAS27980 CHECKING THE SWITCHES ...
Page 284: ...ELECTRICAL COMPONENTS 7 43 ...
Page 291: ......
Page 292: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...
Page 293: ...WIRING DIAGRAM YFM25RY YFM25RSEY YFM25RSE2Y ...