Tough aggressive and light weight dyna sys11 left hand slx rapidfire shift levers with vivid indexing and 2 way release function light to the touch but positive and crisp vivid indexing provides a constant amount of shift lever force 2 way release allows shifting from various riding positions the upper lever still performs the same shift function but it can now swing in either direction allowing it to be released by the thumb or index finger pod design allows the use of these shifters wit