Motor vehicles – Special wheel base – Having only two wheels
Patent
1980-01-08
1982-05-04
Song, Robert R.
Motor vehicles
Special wheel base
Having only two wheels
60313, 123 55VF, 180225, 180227, 180296, 181238, B62M 706, F01N 708
Patent
active
043278116
ABSTRACT:
A motorcycle has an engine with two banks of cylinders. One bank is forward of the other, and its exhaust pipe or pipes passes forwardly, downwardly, and outwardly of the frame, and then rearwardly beneath the side of the engine to reach a muffler and tailpipe. The frame includes a pivoted fork-like rear section with a power transmission. The rear exhaust pipe or pipes extends rearwardly and downwardly between the arms of the rear section, and makes connection with the muffler. In another embodiment for engines with multiple cylinders in each bank, the rear exhaust pipes cross over one another, and extend downwardly outside of the arms. They may also be elongated inside the muffler so the lengths of the forward and rear exhaust pipes are equal. They can connect with one another so as to share outlets into the muffler.
REFERENCES:
patent: 2940249 (1960-06-01), Gospodar
patent: 3453824 (1969-07-01), Biesecker
patent: 3937484 (1976-02-01), Morioka et al.
patent: 3949829 (1976-04-01), Honda et al.
patent: 4204585 (1980-05-01), Tsuboi et al.
patent: 4226296 (1980-10-01), Higaki
patent: 4230074 (1980-10-01), Ichikawa et al.
McGiehan Donn
Mon Donald D.
Song Robert R.
Yamaha Hatsudoki Kabushiki Kaisha
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