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Teagle Classic Bikes

The firm of Teagle was started by Mr W T Teagle, originally a farmer, and still very energetically concerned with the firm as managing director and also very concerned with the design of new implements. The firm progressed from very humble surroundings to now three factories embodying some of the most modern machine tools and equipment.

They produced two basic engines: a two-stroke 50cc and a four-stroke 126cc; both being produced due to necessity, which is the usual reason. The 50cc was designed as part of a manually carried and operated hedge cutter. The unusual feature of having the belt pulley central was for a variety of reasons. It provided the correct balance of the engine in the machine, it enabled an on/off clutch by tightening the belt and it enabled the use of an overhung crankshaft. It also widely spread the crankshaft bearings, a desirable factor. The overhung crankshaft enabled a case-hardened crankpin, the use of a needle roller big end and a lower standard of lubrication, a very necessary feature where farmers were concerned! The crankshaft was made in three parts: the main shaft, web (a stamping home-produced) and a high nickel case-hardened pin. The shaft was welded with the pin under water, thus retaining its hardness. The crankcase & cylinder, cylinder head and cover & cowling were pressure die-cast in high silicon aluminium alloy by an outside firm to our design.

The manufacture of this engine was tooled up in a responsible way. For example: the cylinder & crankcase unit was mounted in a machine; all machining, boring, drilling, facing, etc being carried out completely automatically and simultaneously. An unskilled operator loaded and unloaded the casting, going in as a casting and coming out ready for building into an engine in about 30 seconds.

Many thousands of these engines were made, in fact the normal daily output was just over 100 engines. Although originally designed for a hedge cutter, it eventually got used in a motor scyth, lawn mower, motor cultivator and a power pack on a bicycle. They were exported to most countries. The engine, like the four-stroke, was built up to a standard rather than down to a price.

When treated properly, these engines have an excellent life. Production of the 2-stroke finished in about 1959.

Bike Image Description
1955 Teagle 1955 Teagle
1955 Teagle Cyclemotor 1955 Teagle Cyclemotor They were made in Cornwall, perhaps the only motorcycle ever to be made there, by an agricultural machinery manufacturer and used a chainsaw motor.