MotorTrike mechanical reverse

[470004]

I just installed the MotorTrike mechanical reverse. I am looking to change the shifter knob. Does any one know what is the thread size. I called MotorTrike and they did tell me that the knob/shaft is threaded, but did not know what the thread size of the knob/shaft.

 

[tom w]

I replaced mine with an after market skull head but it had a nylon sleeve in it and a lock screw. sorry not much help.