Apex Primary Clutch

[74Nitro]

I'm running the RX-1 8FA weights currently with both heavy rivets.
41-37 helix

I've put a few thousand kms on since.
Almost 18000 kms total. Original clutch. Really like the 8FA weights, curve is almost identical to the Daltons. 75g.
Really happy with the Ultimax belt. It is so easy on the sheave surfaces. Almost zero grooves at the bottom.
I've ordered a 44/40 and 41/39 to test.
Black/bronze in primary and going to try the black/red as it has less total force.
Rollers are TP 15.8
Stock muffler, 230-260hp.