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British Motorcycles

Peco Motorcycle Engines

Pearson and Cole of Duddeston Mill Road, Birmingham.

A NEW PECO ENGINE.

As the present 2¼ h.p. Peco two-stroke has proved so satisfactory there is 110 reason for alteration for the 1915 season However, the large demand for a somewhat smaller power plant has induced the firm to construct an engine of 62x69 mm. bore and stroke, which is rated at 2¼ h.p., and has a cubic capacity of 210 c.c.

Almost every feature of the larger engine is reproduced in the new type. To begin with, an improved type of Hoffmann roller big end is used which is considerably narrower over all, in spite of the fact that the roller surface remains as before. This permits of a narrower crank case and consequently higher crank case compression, so that it has been found that the double or false top to the piston, which is so noticeable a feature of the larger engine, can be dispensed with. The small engine also has a plain piston trunk with two pegged rings at the top, and plain mainshaft bearings are employed instead of rollers.

The patented lubrication system is, of course, retained, the oil being led to a ring surrounding the cylinder and passing through holes to the piston, then the surplus is caught by a well below the base of the piston and conducted by separate leads to each main crankshaft bearing.

The new engine is neat and light, and can be supplied for either belt or chain drive; in the latter case a dished flywheel can be fitted which allows the sprocket to be mounted on the outside instead of between the engine and flywheel; consequently chain guarding is rendered a much simpler problem, and the chain is more acessible.

The Motor Cycle, October 29th, 1914. p483

Sources: Graces Guide, The Motor Cycle



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