Honda 2RC146
The Honda 2RC146 was Honda's entry in the 1964 125cc GP class. The type designation 2RC146, starting with a 2, would suggest that there has been a type RC146, of which this is the improved version.
Nothing is actually mentioned anywhere about an RC146 (although one Japanese book gives a picture, unfortunately with mounted fairing), but reading between the lines in the Japanese texts, the RC146 was the bike used in the Japanese GP of 1963, and the bikes then used afterwards in 1964 are the types 2RC146.
The engine is a smaller version of the 250 four, with the gear train to the camshafts from the centre of the crankshaft.
Bore and stroke are 35.26 x 32 mm for a total capacity of 124.99 cc. Ignition is by a transistorised breakerless system, with 8 mm spark plugs as on the RC113.
Power output is 28 bhp at 16,500 rpm, red line at 18,000 rpm and short time allowable maximum is 19,000 rpm. An eight speed gearbox is fitted to keep the engine within its narrow powerband.
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