90lxrider

i have like clutch chatter when in reverse...and at idle with the clutch release it sounds like a knock from the bellhousing region....thought it was a loose flywheel ..took it apart and it wasnt...but i was looking at the clutch fork and it had a lot of up and down movement...could that cause the chatter and the "knock"..if so should i get a pivot ball clutch fork and cable.....???

kind of stumped