dt125r dep pipe!

[Dt125r-ash]

hi there, this might be a stupid question but, bought a new dep pipe today and im having trouble with fitting on to my standard exhaust, do i have to cut anything off on the standard exhaust to make the dep pipe fit onto it? as it wont fit to the standard exhaust. im not so sure :S but come on here for help. go easy please [/img]

[prawny1]

I don't recall needing to cut anything on mine.

Remind me though does the dt use a rubber coupler standard as I seem to recall having one on my dt with a dep all those years ago.
____________________
hellkat wrote:

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[Dt125r-ash]

thanks for the reply, yes it has a rubber connecting to the pipe and the exhaust, its this one. https://www.wemoto.com/bikes/yamaha/dt_125_r/98-00/picture/front_pipe_to_tailpipe_rubber/

thanks.

[Boxing]

You got the pipe for the correct year as yours? 1988-2003 or something like that is the ones to fit the DTR's.

You'll also need two O-rings. Similar to this: https://www.ebay.co.uk/itm/EXHAUST-RUBBER-SEAL-GASKET-O-RING-for-YAMAHA-YZ125-/160341274163?pt=UK_Motorcycle_Parts_13&hash=item255515ae33

Can find them cheaper and in a pack of two or three for about £3 just got to look for them.

You might need to take the silencer off to fit it, and it's a pain to line all the holes up. I do the two bottom 13MM bolts on the exhaust port then put in the bolt at the back near the frame then loosen the one near the engine and rotate it to fit properly.

If you have no one to help you fit the exhaust just sit on the floor and use your leg to hold it. It's what I do.

And go buy loads of ACF-50. I'd go through eBay, all bike shops and Halford's didn't have any near me. Sold me some garbage that didn't work and now my exhaust is all rusty.

The gutted standard expanny is best on the DTR's. Waste of £185 IMHO. The DEP's are all dented after a single drop.

[Dt125r-ash]

yes its the correct one mate.

and yeah lining them up is a bi*ch, thanks for that i will try it

and i only payed £20 for it so the rust already got there but just wanted to see if a down pipe would give it that more humph then i was gonna derestrict the standard one

and did you use the pipe to exhaust rubber on yours?

thank you so much for your advice very much appreciated

[Dt125r-ash]

my front pipe wont fit onto the standard end can should i make the hole bigger so it fits? anyone else have this problem and what did you do ? thanks

[nathan k]

Photo of the connection that dosen't fit would be great, i'll get a photo of how a DEP silencer fits, might help.

[Dt125r-ash]

how do i add a picture on here as ive tried numerous times?

[nathan k]

[Boxing]

[Dt125r-ash]

thanks for your reply appreciated,

and here are the links for the images thanks

https://i.imgur.com/Bv6zlDT.jpg

https://i.imgur.com/znC2lt6.jpg

https://i.imgur.com/IsLOCp0.jpg

https://i.imgur.com/DX0DUDQ.jpg

[Boxing]

Loosen the silencer holding bolts, and then try and connect them. If you can't get the bolts to line up on the frame, loosen both bolts for the expanny, NOT the 13MM ones on the port though, then there is play on the exhaust to line the bolts up.

Don't forget that rubber, it's important.

[Dt125r-ash]

awwwwwwww great mine is the 2002 dt125r model

and what do you mean by buy an athena, i think im just gonna try and make the hole a bit bigger to fit on the exhaust, iva way im only losing £20, i only wanted to see if it made a improvement then buy a whole set, as my dtr wont go past 55-60 on a good day

much appreciated with helping me out tho guys anymore help would be appreciated to

[Boxing]

Hmmm, 60? Where's it revving up to? 10K RPMs should be about the norm in gear.

Mine will do 70-75MPH. It's a mere 125CC it won't go much quicker.

What's the mileage? Has it ever had a topend rebuild?

And it's a mere £20. If you drill out the silencer, chances are it won't fit the standard expanny. More than £20 then.

And the Athena silencer is this: https://www.ebay.co.uk/itm/YAMAHA-DTR-125-ATHENA-RACE-EXHAUST-TAIL-PIPE-DT-125-R-RE-ENDURO-RACING-SILENCER-/121031619055?pt=UK_Motorcycle_Parts_13&hash=item1c2e0bf1ef

The DEP expanny, depending on condition could get the rust took off and then spray it with some heat proof paint. But it wouldn't be shiny any more, it'd be black.

[Dt125r-ash]

7-8 if im lucky but thats with the standard pipe and exhaust.

lucky for you i get overtaken by mopeds, yeah MOPEDS :O :'(

and get ready for it (drumroll) 62,000 and i dont no previous owner said he never done anything to it but its only had 3 owners including me, and the engine sounds and runs to sweet to not have had a engine rebuild last 10k, oh and btw the guy i bought it off used it for work then got it mot'd then left it for a year... thansk for the reply

[Dt125r-ash]

ohhh and btw, when i said make a bigger hole i ment on the dep pipe what i paid £20 for, thats the reason i dont wanna mess with the standard stuff so when sellling i got all the original stuff too

[Boxing]

Sounds fishy now mate. (A person doesn't just put a bike away for a year if nothing is wrong with it and they haven't upgraded / got a car.)

You have the exhaust off? Get a torch and look up the exhaust port. Move the kick start down slowly with the ignition off and check the piston, if it's scored there's your problem.

With it being a 2002, chances are all the de-restrictions have been done...

And mopeds beating you, unless they're Runner 170-180's it shouldn't be possible. My DT smokes peds even with a wrecked topend it was thrashing them.

[Dt125r-ash]

forgot to say he did upgrade, he did his full license

and yeah when me and a friend took of the pipe we checked the piston and everything seems fine no scores ect

but im thinking about getting a new topend anyway,

a guy wants to swap a rs125 for my dtr but he wants me to derestrict it first..

[Boxing]

Them RS 125's always seem to get swapped when they're about to blow up.

Get Athena silencer, and get your expanny done, should be good to go.

[Dt125r-ash]

Yeah I see what your saying mate and I appreciate your help,

What's the best way to make a hole bigger on the expanny so it fits on the exhaust ? Thanks

[Dt125r-ash]

Got the dep pipe on now with a Bodge here and there.. And fuck me it goes well