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Non-standard equipment on the front end such as heavy radio receivers, extra lighting equipment or luggage tends to cause unstable handling.Ģ. Friction discs or steel discs worn or warped.ġ. Lubricant level too high in primary chaincase.ġ. Shifter engaging parts (inside transmission) badly worn and rounded.ġ. Shifter drum (inside transmission) damaged.ģ. Corners worn off shifter clutch dogs (inside transmission).Ģ. Shifter forks (inside transmission) sprung.ħ. Shifter return spring (inside transmission) bent or broken.Ħ.

Transmission lubrication too heavy (winter operation).Ĥ. Primary chaincase overfilled with lubricant.ģ. Excessive “pumping” of hand throttle grip.ġ. Inlet valve and/or valve seat worn or damaged.Ħ. Dirt or other foreign matter between valve and its seat.ģ. Contaminated speedometer sensor (remove sensor and clean off metal particles).ġ. Loose or broken wires in charging circuit.ġ. Voltage regulator/rectifier module not grounded.Ĥ. 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.ġ. The subsequent pages give detailed procedures.

Most YFM 350 Yamaha service manual chapters start with an assembly or system illustration, diagrams, exploded parts view, quality pictures, service information and troubleshooting for the section. It compensates for the initial wear that occurs during the life of the of the YFM350.Īll chapters in this Yamaha YFM350 service manual apply to the whole vehicle and this Yamaha service repair manual illustrates procedures for removal & installation of components that are in detailed step-by-step fashion. Performing the scheduled maintenance is very important. 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. This service manual describes the service procedures for the YFM350 (YFM-350) Yamaha Bruin, Warrior, Big Bear, Wolverine & Raptor ATV.