Classic Cycles Technical Resources
29
FOR THE 175 DUAL TWIN
The rotary valve used on the 175 Dual Twin is interchangeable for either left or right side and must be
timed accordingly when installed. The valves are marked with an L and R.
The appropriate mark is aligned with the key slot in the crankshaft collar depending on whether the valve
is being used on the Left or Right side of the engine.
KICK STARTER MECHANISM:
Construction and Operation.
All Bridgestone rotary valve models are equipped with the primary kick starting system. In this method,
the engine can be started in any gear by simply squeezing the clutch. This is possible because this system
employs an extra set of gears for by-passing the clutch in starting the engine. This is a decided advantage
since it is not necessary to seek out neutral gear in order to start the engine.
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