2005 Ski-Doo Racing Handbook, Page 32Get this manual
SECTION 03CHASSIS PREPARATION
SUSPENSION OPERATION WEIGHT TRANSFER
The purpose of any suspension system is to isolate the rider from the terrain while still allowing for complete control of the vehicleA snowmobile rear suspension has the added requirements of providing weight transfer and maintaining correct track tensionWeight transfer is essentially the shifting of weight to the track for better traction during acceleration, and to the skis for positive handling during corneringThe physics that apply to all rear suspensions are basically the sameAs we apply torque from the engine to the drive axle, the torque is transferred to the track and pulls it for forwardThat energy enters the suspension system at the rear axle and tries to pull it forward (force "C" in following illustration)The rear arm is pivoting or sliding linkage that only provides vertical forces at the rear of the chassis, therefore, none of force "C" enters the chassis at the rear arm1 Y
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