Download A Yamaha Raptor 50 Service Manual For Repair 2004-2008 YFM50 (YFM-50)


DOWNLOAD Yamaha YFM50 Raptor Repair Manual 2004-2008 YFM 50
DOWNLOAD Yamaha YFM50 Raptor Repair Manual 2004-2008 YFM 50
� � � � � This 2004 2005 2006 2007 2008 Yamaha Raptor YFM50 (YFM 50, YFM50S) INSTANT REPAIR MANUAL DOWNLOAD was designed primarily for Yamaha Raptor YFM50 factory service technicians in a properly equipped shop...
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This service manual describes the service procedures for the 2004, 2005, 2006, 2007, 2008 Yamaha Raptor YFM50 (YFM-50). Follow the Maintenance Schedule recommendations to ensure that the ATV is in peak operating condition and the emission levels are within the standards set by the your states/county Resources Board. Performing the scheduled maintenance is very important. It compensates for the initial wear that occurs during the life of the Raptor 50.
All chapters in this Raptor YFM 50 service manual apply to the whole vehicle. This Yamaha Raptor service repair manual illustrates procedures for removal & installation of components that are in detailed step-by-step fashion.
Most 2004-2008 Yamaha Raptor service manual chapters start with an assembly or system illustration, diagrams, exploded parts view, quality pictures, service information and troubleshooting for the section. The subsequent pages give detailed procedures. If you don’t know the source of the trouble, go to the troubleshooting page for a list of causes and effects to determine the problem.
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Alternator Does Not Charge

1. Voltage regulator/rectifier module not grounded.
2. Engine ground wire loose or broken.
3. Faulty regulator-rectifier module.
4. Loose or broken wires in charging circuit.
5. Faulty stator and/or rotor.

Alternator Charge Rate Is Below Normal

1. Weak or damaged battery.
2. Loose connections.
3. Faulty regulator-rectifier module.
4. Faulty stator and/or rotor.

Speedometer Operates Erratically

1. Contaminated speedometer sensor (remove sensor and clean off metal particles).
2. Loose connections.



1. Dirt or other foreign matter between valve and its seat.
2. Inlet valve sticking.
3. Inlet valve and/or valve seat worn or damaged.
4. Float misadjusted.
5. Leaky or damaged float.
6. Excessive “pumping” of hand throttle grip.

Shifts Hard

1. Primary chaincase overfilled with lubricant.
2. Clutch dragging slightly.
3. Transmission lubrication too heavy (winter operation).
4. Shifter return spring (inside transmission) bent or broken.
5. Bent shifter rod.
6. Shifter forks (inside transmission) sprung.
7. Corners worn off shifter clutch dogs (inside transmission).

Jumps Out Of Gear

1. Shifter rod improperly adjusted.
2. Shifter drum (inside transmission) damaged.
3. Shifter engaging parts (inside transmission) badly worn and rounded.
4. Shifter forks bent.
5. Damaged gears.

Clutch Slips

1. Clutch controls improperly adjusted.
2. Insufficient clutch spring tension.
3. Worn friction discs.

Clutch Drags Or Does Not Release

1. Lubricant level too high in primary chaincase.
2. Clutch controls improperly adjusted.
3. Primary chain badly misaligned.
4. Clutch spring tension.
5. Clutch discs warped.

Clutch Chatters

1. Friction discs or steel discs worn or warped.



1. Improperly loaded motorcycle. Non-standard equipment on the front end such as heavy radio receivers, extra lighting equipment or luggage tends to cause unstable handling.
2. Damaged tire(s) or improper front-rear tire combination.
3. Irregular or peaked front tire tread wear.
4. Incorrect tire pressure.
5. Shock absorber not functioning normally.
6. Loose wheel axle nuts. Tighten to recommended torque specification.
7. Excessive wheel hub bearing play.
8. Rear wheel out of alignment with frame and front wheel.
9. Steering head bearings improperly adjusted. Correct adjustment and replace pitted or worn bearings and races.
10. Loose spokes.
11. Tire and wheel unbalanced.
12. Rims and tires out-of-round or eccentric with hub.
13. Rims and tires out-of-true sideways.
14. Rear fork pivot.


Brake Does Not Hold Normally

1. Master cylinder reservoir low on fluid.
2. Brake system contains air bubbles.
3. Master cylinder or caliper piston seals worn or parts damaged.
4. Brake pads contaminated with grease or oil.
5. Brake pads badly worn.
6. Brake disc badly worn or warped.
7. Brake drags – insufficient brake pedal freeplay.
8. Brake fades due to heat build up – brake pads dragging or excessive braking.
9. Brake fluid leak when under pressure.