420cc clutch recommendation

max rpm is probably around 5500 right now
gearing for 6:1 - 5:1 and only aiming for a top speed of 75mph
stock with 15hp but will likely mod upwards of 25hp
wheel/tire combo is 26" diameter
this will not be used for racing, only cruising, so hard launches are not going to be a factor. a low stall/lock/engagement would be nice so once its locked it ideally wont slip.

for reliability on long rides is a multi-disk (3 or 4) recommended or could i get away with a noram star or 1600 type clutch?

I am more worried about heat and slipping on long rides than burning rubber.

thanks in advance

there isnt much to look at right now; just a lot of parts in the garage. this is really the last piece of the puzzle i wanted to get dialed in before wrenching.