I have got a tzr and i got the yamaha garage to derestrict it and it dont do over 50mph they recon thats the fastest i can get the bike to go it wont budge past 50mph not even by 1mph have they relimited it or what they recon they aint. If it aint relimited can someone tell me what parts to get with links (UK) to make it go faster. Either reply here or email me please . Many Thanks