I've got a 1990 dt125r, dep rear silencer but only seems to b doin 50 miles per tank, n e 1 got n e ideas, also does any1 no how to derestrict early models mines a 1989/90 model so every1 says its easy but doesn't say how?

Thanx Matt :?

the front pipe has an extra pipe in it,you can see it if you take off the exhaust,and the powervalve is pegged shut if you go to

http://geocities.com/yamaha_dtr125/menu.htm this site will explain everything

Nice 1, allthough got powervalve servo on it, dep silencer but not dep front pipe, on christmas list. any tuning tips?

you could take thr restrictor out of the front pipe,that will only cost you a gasket,further tuning will cost and it is best to get it done properly and you risk making the engine more unreliable