I have a 200e that makes a lot of noise from the timming chain. When I first bought it there was some noise, so I tried adjusting the chain the way I think the manual says, starting up the engine and loosening the adjustment bolt, then tightening it. After I did this the chain sounded much worse. How would I fix this? Did I adjust the chain wrong, or would the previous owner have did some trick to quiet it down which I messed up?