Engine for motorcycle

Details Engine for motorcycle Engine for motorcycle

2008-04-08

2008-04-08

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Frame construction

Horizontal cylinder

C123S1950AC, C074S60600R

Reexamination Certificate

active

07353792

ABSTRACT:
An engine for a motorcycle includes an engine case split in an upper case section and a lower case section. A mating surface between the upper case section and the lower case section extends linearly and inclines forward downward in a side view of the motorcycle. A crankshaft, a transmission input shaft, and a balancer shaft extending in the width direction of the motorcycle are rotatably supported at the mating surface, and a transmission output shaft rotated by the transmission input shaft is supported in the lower case section. The balancer shaft, the crankshaft, and the transmission input shaft are arranged in that order from the front side in the running direction of the motorcycle. The transmission output shaft is disposed below the transmission input shaft.

REFERENCES:
patent: 3888134 (1975-06-01), Miranda
patent: 5078105 (1992-01-01), Ito et al.
patent: 5186078 (1993-02-01), Kameda et al.
patent: 6941918 (2005-09-01), Laimboeck
patent: 2005/0085329 (2005-04-01), Kawakubo et al.

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