DT125R FORUM

Gianelli have that same look:

Has anyone find transparent hose that will tolerate gazoline? I ordered some silicone hose from ebay, but later I realized that silicone does not tolerate gazoline... PVC hose is crap, it hardens fast and will leak easily...

Bike is getting ready for next summer:

That exhaust chamber :smiling_face_with_heart-eyes:

Gianelli silencer:

But need to twist something:

I guess it's easier to warm and twist + cat a little bit of that exhaust chamber tail pipe... Gianelli's aluminium would melt away too easily...

Just perfect!!!

Stainless starts to "eat" other materials, I wouldn't use stainless, and I think it's too hard. Use copper.

Hmm... that's true also... So if I want to use boost bottle, I need to enlarge it about 35% to be in the same as previously 125cc!

Yeah, I'd like to have it too... It have been there for a reason... Okey, maybe I need to try to find such a WR inlet that have boost bottle! This bike will be used 99% on sand or asfalt roads...

WR200 inlet did the trick I need:

Air filter barely misses the rear shock and frame...

Now need to modify those inlet attachment bolt holes to make it fit into crankcase...

Maybe I will loose some bottom torque due to the missing boost bottle!?

Why would you like to play in first place Try to do something for your bike

I have dualboot (win7 & xubuntu) in this (home) laptop, cause my stupid ipcameras need activex to show configuring page correctly... And another is VCDS that need windows also... That might be possible to run under wine etc, but I'm too lazy to make it work since I have to have that windows dualboot anyway... But I can't see other reason to use windows... Okey, playing games could be one...

But my point still stands, why would you use IE lol.

Who said I will? Absolutely hate it, and that's why I have installed firefox and chrome to my work computer...
At home I haven't use windows for over ten years!

@calum said in DT 125 R '88... New project:

Sounds like you caught the tuning bug, very serious this is.

I've had it since 1987

I am surprised you needed a bigger inlet for such a small carb. You can get reducers to fit.

TMX30 will fit quite well to original joint, but the angle is bad... WR200 should have more horisontal angle to avoid rear shock and that joint is originally made for TMX30 carb.

Hey, now I need to get back... After the post, I changed the skin to "default" and everything is normal as it have always been!

Okey, I did the "forget this site" but nothing changed... And as I told, I use WIN7 at work and linux at home, both act the same.

@Calum Athena 170cc set fits well into this 3BN engine, there was no problem to install it. Original piston remain about 1-2mm below deck and dome comes just about up to deck hight. Athena piston comes to deck hight and the dome is smaller and comes just over the deck. Athena claims that compression ratio is 13.2 and that is also what I endup by calculating it... combustion chamber is about 13ml and 168cc devided by that is around 13. That's not actually the real CR, since 2T engines start to compress only after the channels in the barrel when piston comes up, damn I didn't measure that part of piston travel...

Next step is to find better solution for TMX30... I ordered from ebay WR200 intake, let's see if it will line the carb better past the rear shock. If not, I may need to build up my own intake... At this point it seems that the DT230 Lanza boot was a waste of money, it does'nt seem to fit in any way... Anyone interested?

I also ordered 170cc version exhaust from Romeu Henriques, let's see how it fits and feels... Silencer will be a gianelli alu silencer...

Anyone have idea, where to start settings of that TMX30? 135 mainjet felt best last autumn... Maybe 140-150 mainjet and needle one step up?

And for all that are oppressing me to keep this as original as possible, that's not happening now... I will store all original parts for later time if I feel to return this original back again...

Doesn't matter whatever skin I'm usin, there is a huge white bar on top the page! Also it looks weird!

Also can't reply at all... it just gives me a white page that have only red + sign at the right bottom of the page, and nothing else.

If I use no skin at all, everything else is fine, accept I can't see subjects at all!

Here are example... I painted few rows with mouse so that you can see, there are subjects, but subjects seems to have same color than background.

Tried with windows & linux and firefox & chrome...

Yeah barrel might still be useful... I will store it carefully, so I could return this bike original later if I want...

Few days ago, I took the engine in parts... and this is what I found:

Thankfully new parts arrived already:

I tried athena barrel and piston, and it seems that tdc is just as with the earlier barrel & piston.

I will measure both heads and calculate compression ratios just for curiosity...

Still waiting for piston pin bearing to arrive... Old one was just fine, but why not change it to a new one, when it can be done easily...

DT have been sitting in my garage for some time... But today, I lift it up and changed the front fork seals that I ordered over 6 months ago... Left side had leaked inside the fork boot allready... I decide to fill it up with 15W fork oil... just to make it a bit stiffer... After that I measured the quantity of oil drained out... there was about 750ml (both sides together)... No wonder why it was a bit soft...

To make sure that there are something to wait for... I just ordered Athena 170cc kit for my DT :smiling_face_with_heart-eyes:

Still need to find new exhaust... Maybe some stainless... Lets see...

I have '88 3BN and it was equipped with VM28SS carb. Even user manual can proof that.