Is anyone else experiencing a chain rubbing / grinding sound when in 8th gear on their swift? I just got my swift a week ago and although I'm enjoying riding it, I find myself avoiding 8th gear because there is a rubbing sound coming form the chain.
At first I thought that the chain might be rubbing against the frame because of the small clearance between it and the frame, but I didn't notice any marks on the frame itself. When I took a closer look at the alignment between the chain and the cog, the chain is at an angle which is causing the teeth to make contact with the side of the link, rather than the center. I took a look at the crank wheel and there is a similar misalignment, causing the teeth to rub on the side of the chain.
Yesterday when I was riding downhill and quickly shifted into 8th the chain actually came off the crank wheel and fell between it and the guard. This happened twice on the ride, and I had to put the chain back on.
Any ideas on how to make the adjustment so that the chain stays on, and the grinding while pedaling in 8th goes away?