Hi Terry,
We have the ability to make instant changes to the Q-Matic, and have custom designed a lot of drives.
We have modified the Q-matic to custom fit the HF 2.5 HP motor, B & S, Clinton, Tech., Cushman, Honda, etc. It has been installed on too many different motors by dealers to keep track. If the motor has a crankshaft long enough to affix a pulley and a flat side to mount the Q-Matic it will work. Motors from 35 cc to over 10 HP have been filtered through the Q-Matic system with great success. The ability to alter the primary ratio from 2.06 X 1 to 2.935 X 1 with a primary belt change has major advantages when "dialing in" the ratios.
We can even supply you with new proto-type "quick change" primary bearing supports to make changing the primary belt much faster.
Have fun,