I am thinking of going from stock 13/40 to 15/40 toothed front sprocket. I know I will loose bottem end power but gain top end speed. Do i have to buy a new bigger chain or can I just Add a half link or can i just use the stock chin that I have now? I really need your help! Thanks

 

better try a 14 1st its like changing 4 teeth on the rear and stock chain will be long enough