Synchronous rear belt drive system for motorcycles and...

Details Synchronous rear belt drive system for motorcycles and... Synchronous rear belt drive system for motorcycles and...

2006-09-05

2006-09-05

Johnson, Vicky A. (Department: 3682)

Endless belt power transmission systems or components

Positive drive pulley or guide roll

C474S148000

Reexamination Certificate

active

07101296

ABSTRACT:
A synchronous rear belt drive system for belt driven motorcycles and a method of altering the final drive ratio of such motorcycles utilizing the present rear belt drive system is disclosed. The present rear belt drive system provides a plurality of interchangeable sprocket rings, which are assembled on a universal center hub. The selectively interchangeable sprocket rings include different dimensional characteristics and tooth configurations, which produce a wide range of final drive ratios. In one embodiment the front sprocket rings, rear sprocket and drive belt include two rows of obliquely angled teeth that prevent axial movement of the drive belt and permit a narrower belt, reduced sprocket weight, and increased horsepower. In an alternative embodiment the interchangeable sprocket rings include a single, annular row of straight teeth that are compatible with the original equipment rear sprocket and belt and also function to reduce sprocket weight and increase horsepower.

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