Method of converting an existing five-speed v-twin motorcycle tr

Details Method of converting an existing five-speed v-twin motorcycle tr Method of converting an existing five-speed v-twin motorcycle tr

1998-06-15

2000-12-05

Ta, Khoi Q.

Machine element or mechanism

Gearing

Interchangeably locked

74606R, F16H 308

Patent

active

061551252

ABSTRACT:
A six speed gear assembly is having a mainshaft, countershaft, mainshaft 1st-6th gears, countershaft 1st-6th gears, and 4th/6th gear shift member. A shifting assembly with a shifter cam having uniformly distributed and uniformly shaped detents that are engaged by the shift cam follower. The six speed gear assembly has modes of operation corresponding to six speeds (1st through 6th) and a neutral position. The sixth speed is an overdrive speed (the output from the transmission turns faster than the input to the transmission), while the first through fifth speeds correspond to conventional gear ratios.
The six speed gear assembly and the shifting assembly fit within the transmission case of a Big Twin five speed transmission without the need to modify the transmission case. This allows the conversion of a Big Twin five speed transmission into a six speed transmission without removal or replacement of the transmission case and by replacing a minimal number of components.

REFERENCES:
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patent: 3563353 (1971-02-01), LoPresti et al.
patent: 4157044 (1979-06-01), Peltz
patent: 4373601 (1983-02-01), Onda et al.
patent: 4491031 (1985-01-01), Ooka
patent: 4606310 (1986-08-01), Makino
patent: 5542309 (1996-08-01), Wenger et al.
European Car, "VW Tech: Take 6: An extra gear for quieter cruising", pp. 66-68, Sep. 1996.
PCT Form PCT/ISA/206 and Annexed Partial International Search Report.

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