DT125R FORUM

I've only used Zeeltronics on all my bikes and they've been great. I'll be picking another one up for my new project in the years to come. I've heard good things about the Ignitech system @Darty swears by them.

SUPER SKETCHY Chinese Clone! https://www.ebay.co.uk/itm/323872066584?epid=20025607719&itmmeta=01J5409BPQSJMEWRMJFZ2ATFRC&hash=item4b68478c18:g:U34AAOSwjsplY1HG&itmprp=enc%3AAQAJAAAAwHb9DIbmthsF61tkqjZzw1mmO%2BCIpRFTrxBxiCoNlg%2F6Ia96QZFg%2BQVn9W0EHGUMdESGcPgpBAHub3%2FcfeJfiVHrcRSt0gOftLFhqXVKmFgWq5oUHfp%2FY3l0ODvPwIVdrKe8u9FQCvvdM19TWFtYkfKsxiUEly0bQ9AEOt2SYsjJMgF4x7ewiXeLPZ%2B7%2FotAe7jwxMBtryXU4DTDq9f%2FM%2Fhmpoyrl5G8WfKEmjBbTRO%2BUlm6psilKAdWuv23Bk%2BuEg%3D%3D|tkp%3ABk9SR7y7pYCpZA I mean I wouldn't use it but... [image: s-l1600.webp] Does sat Mikuni on it One from the states looks more plausable https://www.ebay.co.uk/itm/387258784286?epid=11020681088&itmmeta=01J540BN34W043QQMWYB8V529Z&hash=item5a2a6c1a1e:g:PkwAAOSwVrRmrNT3&itmprp=enc%3AAQAJAAAAwAnikbBRR1MW0A%2BnPsvSk%2FMQhmjCd%2B0ShOESogilF1WH%2Bdw5nyLSMGboL50qFS8LgviZRVW%2FqEguBjTLQTOcuZd%2B%2BxTAeHcznQWzclSZqHS7mwCf0YHTkX3knvc7ZELI7lRbFx2r0qopvuGrejG3IhNOsvegptFOULiWhOMHbysUoqhOwiHh4%2BEIgNbUJnt5i9pm%2FDVHkBnluGpIog%2B8xR8pMhR6iXb95jMFNiHxg6JhG8mG%2B%2FUqRvcFtfBFyOxZHw%3D%3D|tkp%3ABk9SR9rRroCpZA But looks like it could just be the Chinese one sold off for a profit You used to be able to get these carbs ten a penny...now no such luck

@SpookDog I've had good results with car shampoo in the past, it has the same lubricating qualities as Fairy Liquid but without all the nasty elements which rot the rims from the inside. I used to have this problem fairly often with Avon TrailRiders in the recommended sizes on DTR rims; excellent tyres but it was always difficult to get them to pop the bead and sometimes I had to deflate the tyre completely, remove it and refit 90 degrees around the rim. This is even after blowing them up to 50psi with the valve core removed using a compressor. I've had to leave them at this pressure for 30 minutes or so in the past as well, and resort to other tricks like hammering the sidewall kind of downwards with a rubber mallet at the affected spot (watch the rim!). It was only ever a problem with this particular make and model of tyre, they were ace on the road but Avons have always been a bit strange. Most bike shops fit tyres using the 50psi-no-valve-core-compressor method. This might not be what you want to hear but if your rim responds to this treatment by exploding then it was a pretty safe bet it was sufficiently corroded to be unsafe to use. Slightly off topic but there's a well-known story called "The Imprint of Death" they tell kids at tech colleges about a tyre fitter who was fitting a truck tyre and didn't bother using the circus animal-sized cage they put them in to pop the bead; it went bang and half of him ended up stuck to the ceiling. A bike tyre won't do that but still has a lot of energy stored in it, enough to do someone serious harm if they're stood right next to it. I think if I was worried whether a crusty rim of mine could handle 50psi, I'd be on the lookout for a new wheel to be honest.

Oh nice! Have you got any photos?

@SpookDog On reflection maybe my "dead money" comment earlier was a bit dismissive; I was a bit pissed when I wrote it as I'd had a MTB problem in the rain the previous evening and was looking at the wrong end of spending the day fixing it. So apologies if I've annoyed/upset anyone.

In my opinion is very stupid to stop termic vehicles and force people to reply them with electric vehicles because they are not the main cause of pollution. The governments worry about stopping an 70's year vespa, which can go for 30 kilometers with a litre. But nobody talks about the trucks that travel all day and consume more than every other vehicles. Or the ships and plane, which have no anti pollution law to comply with. And even if we stopped all this vehicles, the pollution will not disappear, because just one country like China or India pollutes as much as Europe and North America together. We should stop to trade with the countries who are destroying the world. The thing I hate the most is that the people who protest against termic vehicles are the ones who daily buy stuff on shein, temu, aliexpress, thinking that there will be no consequence on the environment. Unluckily, who make the laws don't want to understand this. I hope people will become more aware of the real problem, and I hope the eco-madness stops soon.

Nice one, thanks for that suggestion! I’ll give that a go. Ps. Nice name!

@MadGyver Thank you!

[image: 21mSygm.jpeg]

Very cool! Tip: You can embed the photos by using the ![](https://example.com/location/of/image.png syntax.

They are fuel overflow hoses. Attach a hose like shown on the other side and feed it underneath the bike away from any hot areas. They're designed to flow gas away from the bike and hot areas should the bike fall over and the tap not be shut off.

@eric74 Fair play for getting on and replacing the tacho drive O-ring. Looking at your pics I'd say the oil is definitely coming from where the cable joins the tacho drive so I'd order the oil seal for this (item 7): https://www.fowlersparts.co.uk/parts/4083282/dt125r-3py3-1991-999-a/tachometer-gear Looking at the 4th image you posted up, the plastic breather stub should be right behind the tacho drive about where the old O-ring you mentioned is so it looks like your breather is missing (items 14 and 15): https://www.fowlersparts.co.uk/parts/4083277/dt125r-3py3-1991-999-a/crankcase Not sure whether oil would be visibly leaking out of here if it simply wasn't fitted (you never see any oil in the clear tube IIRC) so it may be that someone had the bright idea of plugging the hole with silicone sealant or something similar. Have a poke around here but be careful, if that's what's been done it would be too easy to end up with it disappearing into the crankcase, but if you're patient with the needle nose pliers/tweezers etc. you can remove a wodge of sealant like that from the outside.

A tyre/rim chart I have says up to 80/90-21 is ok,90/90-21 is what I will put when I change tyres. Don't remember where but someone fitted that size to 1.60-21 rim and had no problem.

@Julius And what type of CDI unit do you have?

But what you're talking about is replacing the whole ignition system, flywheel, pick up, stator and CDI because you don't want to have your RE/X crank rebuilt. Which PJME do for £40 https://www.pjme.co.uk/acatalog/Yamaha-DT125R-DT125-R-Crank-Rebuild-4121.html#SID=1170 That doesn't make any sense

@Challenger [image: error] Hi, I followed the advice of Spookdog and Stevie Wonder and ordered one in Portugal from Romeu.. is now on its way and can arrive at any moment in terms of price this was also the best option. I'm very curious about the sound and performance.

It's doable. I've taken parts from 3 Mikuni 28s.One from my DT,one of a TDR250,one that has oil feed tube don't know what bike and made my current carb. The one with broken is off,the bent tube is overflow if memory serves. Chokes are the same.

@dominik22 I take it your pump is not the plunger type? https://www.youtube.com/watch?v=WwFUzgr2xnA This is how I set my pump many many years ago. I did not align the lines intentionally just to run a fraction more oil due to the porting work I was running at the time.

Make sure that the air waves are cleared on your bike, you don't seemed to have mentioned this. So there is nothing nasty blocking your intake solution. A quick, dirty, way to confirm this is to just remove the airbox to carb joiner and take it for a quick run. Sounds like it's running rich, so doing this should cause the bike to lean out. If it's only for a short time it shouldn't hurt. You just want to know if it's getting air. So check the airbox and renew the filter if you find that removing the boot fixes the issue. The other common problem is water getting into the exhaust expansion chamber. So cleaning the exhaust is really vital for a two stroke. I've seen this before where a bike was sat for a long time and the exhaust was full of fluid. The bike would refuse to run if this was the case.