or8 matey it will only do bout 70 cus it will still be restricted ive got a dtr125 1999 model ile get about 125+ as ive had all ristrictors taken off ive had the head skimmed barrel ported to the max same as the head 34mm carb off a rgv wold flywheel lightend and my dads messed about with the crank to do with crank compression and ive got a tz125 piston init and it will rev out at about 1600 grand which is fuckin amazing is screams its bolxe off at u make sure u run it on good 2stroke castrol a747 spells gd and runs fuckin sweet as a nut but i prea mix it much better then u no u are defo gettin 2stroke through i all so have a tz125 pipe on it much betta i no it may not look as good coming under the bike but performance wise much betta than a arrow or a dep pipe there crap ive got both pipes and the rubbis to much of a swan kneck on them no good at all. the other thing ile be doing is putting a yz125 1992 hotrod crank in mine and putting a yz125 top end on brillant any questions just email me matey and ile speak to u about dt's matey sound luke