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Triumph 1921 OHV 4-Valve Rocker Gear
Twin inlet and exhaust valves in this case do not necessitate complicated rocker gear; four dust-proof ball bearings are used.
Credit:
The MotorCycle
Triumph Four Valve 1921
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Index
Triumph Galleries 1920s
Triumph 1921 OHV 4-Valve
Triumph 1921 OHV 4-Valve Rocker Gear
1921 Triumph Model SD
Triumph 1921 OHV 4-Valve
Triumph 1921 OHV 4-Valve Engine
Triumph 1923 Junior 249cc
Triumph 1923 Junior 249cc
Triumph 1923 LW250 Junior
Triumph 1923 Motociclismo
Triumph Poster Coventry
British Motorcycle Books
Triumph Motorcycles
