Patent ID: 7104373

Claim:
An electro-pneumatic control system for a motorcycle transmission, comprising a pneumatic clutch cylinder ( 10 ) used to disengage a clutch by pulling in a clutch lever ( 30 ) via a clutch cylinder rod ( 110 ), valve means being provided to control said clutch cylinder ( 10 ) by regulating a pressure medium flow from a pressure medium source ( 230 ), wherein said clutch cylinder ( 10 ) is a single acting pneumatic clutch cylinder ( 10 ) and said valve means comprise a clutch valve ( 80 ) controlled by an electrically operated clutch valve switch ( 280 ) to allow said pressure medium to be introduced from said pressure medium source ( 230 ) into one end of the clutch cylinder ( 10 ), and a launch control valve ( 60 ) controlled by an electrically operated launch control valve switch ( 310 ) to direct exhaust pressure medium from the clutch cylinder ( 10 ) through a restrictor ( 70 ) in order to slow down a rate of clutch engagement on start-up.