|
|
6.3 CLUTCHING 6 Final Gearing The final drive gear ratio plays an important role in how much vehicle load is transmitted back to the helix. A tall gear ratio (lower Choosing the proper gear ratio is important to overall drive system performance. When deciding on which gear ratio to use, the Gearing a snowmobile too low for extended high-speed runs may cause damage to the drive belt and drive system, while gearing Typically, it is recommended to gear the snowmobile with a slightly higher ratio than the actual top speed the snowmobile will ever 1:1 Shift Ratio A 1:1 shift ratio occurs when the drive clutch and the driven clutch are rotating at the same RPM. The mathematical vehicle speed for a given gear ratio at a 1:1 shift ratio is represented in the chaincase gearing charts located in the Low / High Ratio Low ratio is the mechanical position when the drive belt is all the way down into the drive clutch, and all the way out on the driven Driven Helix / Ramp The helix cam is the primary torque feedback component within the driven clutch, regardless of driven clutch type. The beginning the helix angle, the less side force will be exerted on the moveable sheave. |