Honda's RC148 was the great surprise of 1965.
It is a five cylinder, in principle two and a half 50 cc twins.
Bore and stroke are 33 x 29 mm for a total capacity of 124 cc.
Drive to the camshafts is by gear train between the third and fourth cylinders. Power is 34 bhp at 20,000 rpm. There are eight speeds in the box, and the engine has wetsump lubrication.
The four exhausts of cylinders 1, 2, 4 and 5 sit in the normal place, left and right of the bike, the exhaust of cylinder 3 sweeps up and around the left hand side of the engine, crosses through the frame, to end up under the right leg of the rider.
Dry weight is given as 85 kg.
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