DOWNLOAD 2009 2010 2011 Yamaha Raptor YFM90 YFM-90 Service Manual

Download 2009 2010 2011 2012 Yamaha YFM90 Service Manual

This service manual describes the service procedures for the 2009 2010 2011 Yamaha YFM Ratpro 90, YFM 90 RY/RZ/RA YFM90R. 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 Yamaha Raptor 90.

All chapters in this 2009 2010 2011 Raptor 90 service manual apply to the whole vehicle and this YFM 90 service repair manual illustrates procedures for removal & installation of components that are in detailed step-by-step fashion.

Most Raptor YFM90 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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ELECTRICAL SYSTEM

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.

CARBURETOR

Floods

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.

HANDLING

Irregularities

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.

BRAKES

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.