I replaced the clutch in my unit about 100 hours ago and I am not happy with it. I bought another clutch from a different vendor when I disassemble the clutch I noticed the belt was in backwards. do I reinstall it backwards or do I turn it around? 22, 950 sport HO

22 950 HO Sport. 150 miles. Installed stingray helix with spring and primary kit from RNG. Ran fine but had audible clunk when taking off. Disassembled and inspected everything looked good. Still clunk. Returned secondary to stock and rode. Ran good until I flogged it a little. Then suddenly it sounded like  a bag of marbles bouncing around inside clutch cover, still ran fine. Disassembled and inspected again. Nothing appeared wrong. So I put stock primary weights and spring back in. Runs good no noise. Anyone else encounter this? Thanks.