Right, I decided to change the chain and sprockets on my thundercat, no issues, have done it before, all good.....yes...but. I dropped one tooth down on the front sprocket, but cut the chain with the same number of links as the original, be the original was rather stretched. Should I have taken 1 extra link off, as 1 front = 3 rear, or shouldnt I be worrying about that. The reason im asking, is after changing all this, It was doing a rather weird swishing sound as I was riding. Pulled things apart, and made sure it was all aligned, ran out of light, and will test ride it tomorrow..... Any ideas as to why I get a swishing sound?