just a word ov warning to any dt125r oweners thinking ov buying a Big One exhaust muffler!DONT.as i did.big mistake. you will be told it bolts straight on.you will need an expert welder to make it fit and even then you find it expells so much heat it will melt rear mudgaurd and reg plate i kid you not.the whole alignment ov muffler is wrong.when i contacted supplier i was told to get a qualified person todo the job.i myself have messed with cars and bikes for about 15years and my mate who fitted it is a MOT TESTER/welder/mechanic ov sum 32years.

just a word ov warning to any dt125r oweners thinking ov buying a Big One exhaust muffler!DONT.as i did.big mistake. y

TRY A DEP MUFFLER . I GOT ONE ONE DT250 MX. GREAT SOUND

ive got a big one exhaust on my dt and it fits fine, no problems with it at all!