i didnt have to cut any links outta my chain to put it on.... i might put back on my 13 tooth because it feels like it revs out way to fast and my bike seems alot slower from loosing top end then im putting on my hmf slip on and that adds more low end torgue and i think that even takes away some top end power... and i dont want mine all balls and no speed so i dont think i really need the 12 tooth sproket with my hmf slip on... but ill see wht she feels like when i can ride it agian with the pipe and sproket...