DT125R FORUM

@dan28
Just thinking don't just cut straight through the whole thing as the baffle tube inside needs to be an inch or two longer to fit into the end cap of I remember correct

@CalDT125 Great result - learnt something new today 🙂

Sparks and flames is all I'm going to say...

It’s a little silly really I don’t see why numbers matter it’s the db that counts and the dt is so quiet even without the muffler

Checked stroke of oil pump and found set at 0.22mm, OK for 3db1 model (0.20 to 0.25mm ), removed shim and Max stroke 0.17mm now, manual says 3rn1 onwards model 0.15 to 0.20. Bike late 89. Didn't seem smoky at all anyway, think running in below 6k for 400 miles left it a bit oily

@Bananper Without seeing a dyno it's hard to actually gauge.

Two stroke exhaust pipes work off resonance, fitting a pipe designed for another engine is incredibly unlikely to work as intended.

If it does work, then what is likely to be experienced is a shift in power. The WR200 exhaust is designed to produce a particular sound wave at a particular RPM for a particular engine.

When that translates to the DTR, it's likely that it's making less power down low, then picks up to an acceptable level. The change from where it makes less power, to more, (I.E. powerband) is likely to be exaggerated, such that the user thinks it's faster. But without a dyno, it really is hard to tell.

In other words, stick to an exhaust designed for the engine. As it has been designed to provide optimal results.

I doubt it will make any difference. There's a few slight differences between models but the main reason the pipes are different is the later bikes have a different tank and air scoops that foul the earlier exhausts.

I welded it shut

Can you find the link again, Does not lead to any specific DT on sale.

Its sounds a lot better in person and the videos don't really do it justice. I have a video of when I had the DEP on, so I'll put my gopro on tomorrow, get a quick vid of the romeu and post it on here as a "comparison" for anyone interested

@calum .ye pal expansion chamber. Tanks for your help. I drove a dt 80 in 1990 and had it for 5 years. Now a good bit older😎. I am putting together a very clean dt125r I have had stored for 4 years... so just changing a few bits.. should be back up and running in a few weeks..Tanks for the advice pal..

Thanks guys much appreciated i will get on and order a stainless dtx one from romeru on ebay 👍

@bananper they always sound more tame when new, wait until the silencers full of carbon

@calum I'm not fan of 4-strokes either, i love the crisp sound of a 2-stroke motorcross over anything, the pipes looks 10 times better than the 4strokers aswell. 450's are sick tho, and in fact for mx the 4-strokes have a benefit because of the powerband being so consistent in a way.

My friend put a leovince exhaust on his mt125, it looked a lot slimmer and sounded better than the stock one. Sounds nice in the beginning but after listening to it for a while it turns into being annoying :P.

@irongamer727 I did the same mod as @oldman suggested. I used this stuff from ebay;

https://www.ebay.co.uk/itm/Fairing-Panel-Engine-Exhaust-HEAT-SHIELD-Track-Day-Bike-Race-Bike-Self-Adhesive-/131062781562?hash=item1e83f3567a

It was top quality, super easy to use and worked really well too !!! 😉

@irongamer727 To be honest, I would be lying if I said I knew anything about exhausts.

Are your exhaust good sounding? My Arrow pipe sounds pretty much like the stock pipe. No nice ticking 2t noise like a normal 2 stroke pipe makes...

@acridjacket2t Hi welcome aboard, some of the TDR owners on here will hopefully able to shed some light on this for you ???

@irongamer727 Well this is it, I wouldn't have thought so. But you'd have to speak to someone who has ran that setup.

I have the full hendriques system, my bikes stock apart from airbox snorkel removed, 250 main jet works well.