DT125R FORUM

@Calum said in Is that a DT?:

@Uber_Beluga Wow, blast from the past.

Just cause you got your bike/car license doesn't mean the DT has to be relegated.

Yeah, it shouldn't should it! I'm keen to carry on, but that bolt has me beat.

@theportingmaster said in Is that a DT?:

Use these for my powdercoating as powdercoat a dt frame for £110
http://www.triple-s.co.uk/index.htm

Thanks, great to get recommendations. There are so many cheating lying traders around me in London, it's a pleasure to take a trip to get honest workers to help me out.

I've added some more pics and an update. Yes, it's been a while, I got my big bike license and cars etc, so the little DT's been tucked away in the shed.

I'm hoping to keep working on it, but who knows, maybe I'll only be back in a couple years again.

@ricky0115 I guess "fit" is a bit of a variable. It has been made to stick to the frame. We'll see how that was done when I get it off. I'm not sure if I'll put it back on. I'd like something far smaller.

I can see in old CBT it got an advisory for "tank rubbers".

@ricky0115 No, I beleive that is off an SR 125. It has a high tech lock system fitted involving a screwdriver and hammer.

One of these little guys:

place holder for pt 8

place holder for pt 7

place holder for pt 6

place holder for pt 5

place holder for pt 4

place holder for pt 3

place holder for pt 2

SO, some small time passed.

Bike has been partially stripped. Feels good to get all the Faux retro crap off.

Then, I got stuck at the bolt which holds the swing arm and engine to the frame.


Corresponding nut came off with some encouragement, but nothing I can do is getting that bolt out. WD40 overnight, block of wood and a hammer and it hasn't budged.
I'm planning to throw it in the back of my van sometime and get my mechanic to give it a go. I think normally, where those flat plates are, you would have raised standoffs. The other problem is that I'll now need to fabricate a seat (I got rid of the old school one before seeing this)

The other problem is someone has been messing with the frame. I'm actually pretty gutted about this. I'm on the tall side, so a lower seat is far from ideal. I considered getting rid of all my DT stuff when I saw this, but I'll keep going and maybe put some jack up links on when I'm done if it's too low.

Next weekend I start a full overhaul of my 2002 DT125R.

It's had many people work on it in the past. Some have done some good jobs, many have done bad jobs.

Standing in good light from the right angle she actually looks quite pretty, although remarkably unlike a DT. So, let's start there.

As you get closer, you start to notice what this bike really is.

In this thread I'll be documenting the full project. I'll be focusing on images rather than text as I know it's far more fun to page through a rebuild photo by photo than reading me writing. I'll be relying on you guys a lot for your knowledge so hopefully this will keep you entertained enough to keep helping me.

For the sake of setting the stage I will explain the goals of the project, what I want the bike to be, along with some of the big milestones which I need to reach to get there.

I want the bike to

• be a lightweight TOY for me to enjoy.
• be roadworthy
• handle some light enduro as I want to join an enduro club just a little out of London and use this initially.
• have some quick swap wheels for road use without needing to mess around with calipers too much or change tyres.
• be clean, legit and free from all janky 5 minute solutions. I dont like rust, horns attached to radiator mounts with cable ties, wood keeping number plates attached, etc. etc. etc.

To get to that point I have a few major tasks to get past:

• Bike needs to be entirely stripped and documented - (I will forget where things go)
• Engine needs to be rebuilt - (I'd like to keep the 170 kit if possible, I'll be trying this myself, but will be the most I have ever done on a bike)
• Frame needs to be treated and power coated - (Not sure if this is feasible in a home garage without expesive sandblasters etc)

Thanks for looking, enjoy the pictures as they come weekend by weekend.

How did you get on?

Thanks for the advice.

I really like the rear light on the RE models. Once the bike is running I'll try get one off Ebay and... MAKE.. it fit.

Also for me it wouldn't be so much of a switch as I got the bike without any original bodywork, it's a bit of an ugly duckling.

Does anyone know what year plastics fit on what frames?

I have '02 DTR. I would like to fit plastics from the RE models that started around '04.

I assume they won't fit, but I thought I'd ask...

Hi,

going to take on the full rebuild soon and I want to order all my parts ahead of time. This is the list I have so far:

• "Main bearings" (Yamaha DT125R Crankshaft Main Bearing And Seal Kit http://www.pjme.co.uk/acatalog/Yamaha_DT125R_Engine_Parts_Bott.html)

• "Gaskets" (Yamaha DT125R Full Gasket Set Athena http://www.pjme.co.uk/acatalog/Yamaha_DT125R_Engine_Parts_Bott.html)

• "Gasket sealent" (http://www.ebay.co.uk/itm/LOCTITE-515-Anaerobic-flange-GASKET-sealant-GLUE-50-ML-B-B-04-2018/261831854946)

• "various Gearbox bearings" (As detailed here https://dt125r.co.uk/topic/14/gearbox-bearings)

• "Crankshaft rebuild service with new conrod"(http://www.pjme.co.uk/acatalog/Yamaha-DT125R-Crank-Shaft-Rebuilding-Service-.html)

Should I be buying a new Piston? Or only if it looks visibly damaged when I take it apart?
Do I need to do anything differently or buy any special parts considering I have the athena 170 kit?

Thanks for the advice guys. I'm going to put together a full list of parts that I need to order and come back to check with you.

In terms of tools, I have a pretty standard set of tools available to me. Is there anything special I'm going to need that you don't find in a standard tool set? I don't have a spanner that can measure the torque of bolts, would I need one?

Hey,

I'm about to do a rebuild on my 2002 DTR. (Has the athena 170 kit from previous owner)
The most I have done before is clean carbs and rebuild brake callipers, so something is bound to go wrong

I plan to take everything as apart as I can take it and hope I can get it back together again. There are a few scattered and disparate guides for different parts of the dissamably which I plan to follow. One of my concerns is how I will identify what to replace and figure out what is wrong. I want to set the bike up for many years of life, with me (hopefully) or another owner, so I'm happy to replace slightly more than neccessary, but don't want to be ordering the entire catalogue of spares if possible.

The mechanic who last looked at the bike said something about crank bearings and that he could "wiggle" it/them with his hand, he wasn't that informative, but he didn't charge for the diagnosis and I opted to push the bike home rather than start a long spending spree with him. The guy's spanner skills are far better than his English, so I don't know how much more I can get out of him. I know diagnosis of anything isn't something you can teach with a 5 step process, but does anyone have any tips other than "look for things that look wrong"?

Common issues? Things that are good to replace?
Other random rebuild tips?

Hi guys,

I've finally got another DT after my last baby got stolen. Still sad, but time to move on.

I picked this up for 650 last weekend

Doesn't look much like a DT hey? It has an SR125 tank and headlight, I have no idea where the seat came from. No plastics at all.
It's all very tatty and seems to have some issues which I'll hopefully be getting your help on soon!

Anyway, what do you think of the bike? 650 was probably a little much considering it dies when you try to give it too much power... I'm thinking overfueling as it's also leaking petrol out the carb seemingly 27/4, but I really wanted a faster 125. I can't ride my big bikes until I'm 24 (UK licensising is such a pain) and the CBF 125 I bought for an interrim run around just didn't make me smile.

It's got the athena 170 kit on it, seller said the fuel pump was "plugged" as a result. Hopefully I'll be able to fit another as I'd like to get the back into a nice neat state... we'll see what he means by plugged when I take the pump cover off I guess.

first job is fixing the cutting out though, I'll put a post up in the technical section about this... probably tomorrow. Would appreciate your expertise then if you have some time.