Hey, I have a Bandit 250 1994 model. The chain is on its way out and has been pretty slack. The chain was touching the centrestand. I've used the rest of my adjustment (pretty much) and noticed some "tight spots". Where the chain is tighter at a point where i spin the back wheel than other points. Now when riding at around 70 klms i hear a slight knockity knock noise (i think it may be a little tight now because of the tight spot and I didnt adjust for sitting on the bike or bumps). Could this be because the chain is really worn or is it cause its off centre. It doesnt look off centre and seems to be tracking straight (I did both sides up the same amount). I thought it could be the tight part I'm hearing. My next question. I've read a bit of a very basic guide on the net to changing the chain and sprockets and it seems simple enough with the right tools. How hard is it to change the chain and sprockets. I know the sprockets wouldnt be a hassal but getting the old chain off seems like one hell of a task since i think I have an endless chain. Any help or advice would be apreciated. Yes taking it into a shop is an option but I'm "working" from home all weekend and would prefer to get to know the bike a little better. Cheers, Troy.