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1. 2003 Yamaha Yz125 Service Manual
2. 2005 Yamaha Yz125 Service Manual

The 1986-2006 Yamaha YZ80, YZ85, YZ125, YZ250 repair manual by Haynes, covers the following motocross bike models:. Yamaha YZ80, 1986-2001. Yamaha YZ80LW, 1993-2001. Yamaha YZ85, 2002-2006. Yamaha YZ85LW, 2002-2006.

Yamaha YZ125, 1986-2006. Yamaha YZ250, 1986-2006 Note: this manual DOES NOT include WR models. Book Excerpt: 1986-2006 Yamaha YZ80, YZ85, YZ125, YZ250 Motocross Bikes Repair Manual BRAKING PROBLEMS 46 BRAKES ARE SPONGY OR WEAK, DON?T HOLD. Air in brake line (disc brakes). Caused by inattention to master cylinder fluid level or by leakage.

Locate problem and bleed brake (Chapter 7). Pad or disc worn (Chapters 1 and 7). Brake fluid leak. See paragraph 1.

2003 Yamaha Yz125 Service Manual

Contaminated disc brake pads. Caused by contamination with oil, grease, brake fluid, etc. Clean or replace pads. Clean disc thoroughly with brake cleaner. Brake fluid deteriorated (disc brakes). Fluid is old or contaminated.

Drain system, replenish with new fluid and bleed the system (see Chapter 7). Master Cylinder internal parts worn or damaged, causing fluid to bypass (see Chapter 7). Master cylinder bore scratched. From ingestion of foreign material or broken spring. Repair or replace master cylinder (see Chapter 7).

Disc warped. Replace disc (see Chapter 7). Drum brake linings worn (Chapters 1 and 7). Contaminated drum brake linings.

Caused by contamination with oil, grease, etc. Clean or replace linings. Clean drum thoroughly with brake cleaner (Chapter 7). Drum warped. Replace drum (Chapter 7).

Drum brake cable out of adjustment or stretched. Adjust or replace the cable (see Chapters 1 and 7). STEERING, SUSPENSION AND FINAL DRIVE GENERAL INFORMATION The steering system on these models consists of a one-piece braced handlebar and a steering head attached to the front portion of the frame.

The steering stem rides in upper ball bearings and lower tapered roller bearings (early YZ80 models) or tapered roller bearings (all other models). The front suspension uses one of three basic designs: damper rod, bottom cartridge, or top cartridge. The rear suspension consists of a single shock absorber with concentric coil spring, a swingarm and progressive rising rate suspension linkage. The suspension linkage causes the suspension to stiffen as its travel increases. This allows a softer ride over small bumps in the terrain, together with firmer suspension control over large irregularities. HANDLEBARS REMOVAL, INSPECTION AND INSTALLATION (Refer to illustrations 2.3a and 2.3b).

The handlebars rest in brackets on top of the upper triple clamp. If the handlebars must be removed for access to other components, such as the steering head bearings, simply remove the bolts and take the handlebars off the bracket. It is not necessary to disconnect the throttle or clutch cables, brake hose or the kill switch wires, but it is a good idea to support the assembly with a piece of wire or rope, to avoid unnecessary strain on the cables. If the handlebars are to be removed completely, refer to Chapter 2 for the clutch lever removal procedure, Chapter 4 for the throttle housing removal procedure, Chapter 5 for the kill switch removal procedure and Chapter 7 for the brake master cylinder removal procedure. Remove the upper bracket bolts, lift off the brackets and remove the handlebars (see illustration).

2005 Yamaha Yz125 Service Manual

On 1989 through 1993 YZ125 and YZ250 models, the lower brackets can be removed from the triple clamp if necessary. To do this, remove the bracket nuts from below and lift the brackets out (see illustration). Subject: 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Yamaha 2-Stroke Motocross YZ80, YZ85, YZ125, YZ250 service, maintenance, repair. ISBN-10: ISBN-13: 624 Haynes 2662 Above: Ted Abear of Ironton, Minnesota began riding dirt bikes after buying his 2001 Yamaha YZ125 from a family friend. He recently started entering local motocross races something he intends to continue to do in the future.

He tells us, 'I've never felt such a rush before as I do now whenever I take my bike out to go ride!' TABLE of CONTENTS: About this manual Introduction to the Yamaha YZ Identification numbers Buying parts General specifications Maintenance techniques, tools and working facilities Safety first!

Motorcycle chemicals and lubricants Troubleshooting. Tune-up and routine maintenance. Engine, Clutch and transmission. Cooling system. Fuel and exhaust system. Ignition system. Steering, suspension and final drive.

Brakes, wheels and tires. Frame and bodywork. Wiring diagrams. Conversion factors Fractions Service record. Index.