i got a stock 06 busa ..... 17/40 sprokets,.. is that right? i want to go to a 16 or 15 front , i want more low end, cause i never ride 180 mph,...how easy is it to change the front, or should i just change the rear sprocket to a 41 or 42 whats the beat way and how much will it change my rpm's, can still use the same chain, thanks in advance