I have 2 off-road yard karts (one for my son and one for me a 300lb man) they both have 6.5 tec at the moment. I want to upgrade mine first and this is the motor I am looking at buying Both karts are setup with the TAV2 3/4" shaft system and this motor has a 1" shaft, plus its not rated for the HP. Could any of you point me in the right direction for a clutch. It would be sweet if I could leave the same driven unit and just upgrade the drive only, but I'm sure thats not possible is it?