Found a guy with a jug and cylinder local that's parting out his 05 bought the bike from dealer couple of months ago and hasn't rode much. Cylinder is in very good condition, piston too. Do I need to Rejet? I'll put this in and put some hours on the piston, and then upgrade to a 13.5...again. Grey would probably know this what are the hp differences between the stock and 13.5? What high comp piston would you prefer or would you prefer stock ratio? JE, CP, Wiseco Pro X? Ive used Wiseco in all of my 2 and four strokes just because everyone else uses them, but input from TT members!!