DT125R FORUM

Yesterday I did the compression test 110 psi.

@Darty, thank you ;), I drove the x number miles calm and not to high rpm. But my mate got a compression tester, maybe I should test this first ?

@Jens-Eskildsen, this afternoon I put back the mainjet 240, maxspeed is 60 mph and max revs 9500 RPM.
It's a little better, but not like it should be..

@Calum Thanks man already did http://www.dt125r.co.uk/topic/354/loss-of-speed-and-revs

Hello guys,

So here is the story: I bought my Dt125r 2002, 2 years ago, it was driving fast, quick response to 75 mph and i could redline the RPM.
But it wasn't reliable, sometimes it bugged and acted strange.
Than I thought, let's put it back original. I removed the carb, cleaned it and replaced the main jet (280) to original (240) the rest on the carb was original.
I drove to work and on my way back it acted strange, it bogged and died..; (to lean) piston rings worn, so no compression.
The previous owner, drilled holes in the airbox and cut the whole top open. (way to much air + main jet 240 = to lean.
Took my Dt to the garage and the bored the cilinder out. it was alive again.
Now i fixed the airbox and putted a main jet 260 in it (scared to run lean again)
But after the rebore, the bike isn't that fast anymore, maxspeed is 56 mph and max revs 9000 RPM.

Does anybody know what to do or what can be the problem.
I would love that my DT could get his Speed and Revs back..

Thank you. (Sorry for my english)

@CYBER-NINJA Thanks

@2stroketerror Thanks man the only thing i think is that the original headlight is better, but i bought it like this so.. maybe change it later on.

Hello guys,

I'm Stef from Belgium and this is my Dt125r.
I repainted the exhaust and put some new dirtbike tires on, to go riding in the woods ;).
It's my first bike and I love it, sometimes it can be a pain in the ass, but I love it :D.

(I'm glad that I found a Dt forum that is alive)

http://i1044.photobucket.com/albums/b446/Stef_Mangelschots/IMG_20150407_143528_zps4y2qdqlj.jpg