The self - contained four - cylinder engine is designed for installation in the Alan Youngs Kneeler chassis. With regard to the medium output or the normal transmission used, it is moved to the sidecar side.
The British sidecar racer Alan Young has himself built a 500-cylinder Honda four-cylinder engine. For several years he drove a racing car with a Norton-Manx engine, but now Young, who runs a small car repair in the south of London, has built this multi-cylinder engine, which is to serve as the engine of his racing car in the 1966 season.
He took two engines from the 250 Honda sports machine, the CB 72, in which he cut off the gearbox housing and closed the resulting housing openings by welding. The two original crankshafts were replaced by a common shaft for belde engines, which is compressed from individual parts and has roller bearings for the connecting rod feet. In the middle of this "Young" crankshaft the driven sprocket sits between the two original crankcases, and from it the drive of the five-speed Albion racing gearbox, which is installed in the usual place in the chassis. The clutch used is from Norton.
The transmission housings of the CB 72 engines were cut off; The standard carburettors were replaced by larger ones; On each of the two two-cylinder heads there is a double-breaker on the outside.
The cylinders were shortened to bring the compression ratio to 11.5: 1, and the original carburetors having 22 mm passage were replaced by carburettor with 24.5 mm intake. The engine reaches its peak power supposedly at 11500 rpm. It is mounted on a side by side of the side of the side in a special "Kneeler" chassis built by Young, which has a Reynolds short swing fork with hydraulic steering damper and a hydraulically actuated brake at the front.
Author: Mich Woollett
Source: Das Motorrad, 26 February 1966, E 4973D, Page 128
Whether the housings, which are screwed together, are really stiff enough for the crankshaft, is still necessary. In the frame you can see the already installed Albion transmission with the Norton clutch.
In Germany, too, a man of our guild, also in a small workshop, is currently building a Honda four-cylinder on the basis of two 250 engines, which is to form the engine of a racing car. After all that we know of this self-made building, however, it is different in construction and crankshaft design from that of Alan Young, against which somewhat bold "two plus two" coupling we have slight reservations. Probably we will soon be able to report about this German own building.
The fact that we did not do it today has its good reason: when we asked the builder drum, he said that if he were in the MOTORCYCLE, he would be shipped to "visit" or "at least" the tint hear". And so far it is not yet.