DT125R FORUM

Hello! Well I bought it! It pulls good, starts cold in just a few turns of a starter. Bike does not look 30 years old at all. Everything on the bike works, including the YPVS. Sounds coming from the engine sound normal to me, i will attach a cold start clip of the engine sound below. Previous owner had it for normal cruising on the street to the bar and so on.

I do wonder, there is different information, does the cylinder have a nikasil coating? If so, all the bike needs is a new piston thats it?

What is some general maintenance I should do before riding it? How can i refresh the YPVS so it keeps working, same with autolube?


https://www.youtube.com/shorts/LkBWrjSWNoc
https://www.youtube.com/watch?v=NDzEm13lvdk

Thanks for the help!

Just looked up where can I get the Zeeltronic ignition system, turns out they are made 15 minutes from my home Might aswell swing by and pick one up haha

Hey again!

Did a coolant flush, looks like it holds temperature more stable now, it came out dark and brown.

Also continued chasing the 8k rpm limit issue, today I took apart the YPSV pulley and looked at the dot on the shaft marking, looks like it is in the right position? Below i attached two videos, one showing how far i can manually move the shaft left and right and the other one shows how much the servo moves the valve, to me it looks like it does not move the valve that much? Havent taken off the exhaust as I have not yet received the exhaust gasket and Im on the bike everyday so I dont want to have downtime.

https://www.youtube.com/shorts/MiziIZu_GQk
https://www.youtube.com/shorts/Z6HQNFDRNd8

Covered 1100km so far, changed the chain guide, rear tube blew out, 3D printed the front disc guard, changed the seat from black to pink

@HOTSHOT-III Today I redid the foam, used some air filter foam I found and epoxy glued it + new air filter all oiled up. I tested the kickstand switch and it works but the oil light is not working. Will dismantle the tacho tomorrow. I looked at it today, i just remove the two pins underneath and it comes apart?

@HOTSHOT-III Thank you very much for the information! I was just in the garage taking stuff apart and I took a look at the airfilter. The snorkel and everything is there but the foam on the air filter bracket is all fallen apart so I cleaned everything and blew out the airbox. I think this foam around the bracket is needed so it seals correct? Is there a way to reaply it or should I find a replacement one? Pic below to explain what I mean

Also I noticed that the red oil light never turns on, from what I’ve read in the manuals it should glow red while idling in neutral, correct? The pump is working as the bike is smoking

Seat was pink from what I found on the web and I really love the look with the pink seat so i will try to find that

@Calum Thank you! Ofcourse im keeping it original, I already removed Agip and Akrapovic stickers, in all about that OEM look. Cant really ride it yet, getting my license this week.

Thanks for the help on the sound, I really have no idea how a proper two stroke should sound, its totally different to the 50cc Tomos mopeds I’ve been riding with.

Hello everyone!

Planning to buy a DTR125 1996. Has around 33k km, unopened engine. Has new tires, brakes, general service. What should I be checking for when looking at it?

Thanks for the help!