I have a Yamaha XJ600 diversion with a sidecar fitted.
Recently had to fit two new tyres and a new rear sprocket for MOT.
Chain seemed fine afterwards for a while but all of a sudden started making a terrible noise. When I stopped and inspected it seemed the chain was really loose.
If the bike is pushed forward in gear(even with clutch pulled in) the chain is tight, but when rolled backwards it is really loose. It's also loose when rolled back or forward in neutral.
Thought about just tightening the chain but I'm worried that if I do then it will be too tight when on the go and could snap or cause damage.
Could it be the wheel alignment? Is the chain just loose and tightening up when tension is put on through pushing forward? Might the front sprocket be damaged? Or something completely different?
With the sidecar fitted it's awkward to get in to work on the bike (to check front sprocket etc) so thought I would ask and see if anyone knew what might be the problem first.