right stu the clutch is the same diameter as as the 21 u can use a 21 clutch late a cossie cove and bearing amd u need a bush made up to spce the input shaft
my way modify the cossie fly wheel to to take the reno clutch and then use a paddle clutch for the extra power u have gained hth
jay
or heres a idea take ur quad apart get a cossie beam madified and rwd it thatll be fun