TWIN-DRUM SHIFT SYSTEM (HART OF QUICKER SHIFT)
This system, accompanied with a unique layout of speed gear sets, enables quickest shift among neighbouring gears.
OPERATIONS
SHIFT OPERATION (N → 1ST GEAR)
On each drum, two forks are located in a position makes 120 degrees.
For N → 1st gear: Only drum-1 rotates.
SHIFT OPERATION (1ST GEAR → 2ND GEAR)
In case of 1st gear → 2nd gear: Two drums rotate individually.
Drum-1 makes 1 to N.
Drum-2 makes N to 2.
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