I have a 88 Venture royale got this bike used and having some problems with the clutch we think. Pull the clutch in its fine let it out in any gear but neutral and you get a grinding noise and trys to move but don't (almost like a rocking movement). Rear wheel does turn while in gear. Checked the clutch disks all seems fine, other than cracking the case and checking the second gear don't know what else to do. Anyone have any ideas?