I realise it’s a bit of a cheek seeking help before even contributing but here goes I have XS650B and currently have a problem with drive train shunt. Even if you ease the clutch out really slowly there’s a clunk you can hear and feel. It’s clearly not good and something somewhere isn’t happy. Paying very careful attention to all the adjustments alleviated it a bit but failed to eradicated it. It hasn’t always done this. Figuring it was likely failed springs in the clutch basket I stripped the driver side and found nothing wrong with the basket, though a couple of the springs weren’t under tension, so can move about a little. As I had an alternative basket with no play I fitted that as well as the later type basket bearing. Saw no other issues carefully reassembled. Checked the gearbox sprocket is tight on the shaft and the rear sprocket firmly bolted to the hub. And I still have my clunk. So there’s about 1.5 inches of play when in gear measured on the circumference of the rear wheel, which is about 5/8” at the rear sprocket. Without something to measure that against not sure if that is typical or bad. The only engine mod is I’ve removed the starter motor and the gears at that end of the cross shaft. The gear change is fine, clutch action is good and it’s fine once under way. I know my way around an engine and everything about it says a clutch issue or something loose but damned if I can find it. Suggestions appreciated.