If the bore is OK leave it alone you just need to find the right piston. Go through an authentic dealer, also get the bore measured by an engineer so you know exactly what size you’re looking for...

Is yours leaking?

If yours has to be perfect then you will have to search all stockist for a New Old Stock, bound to be one somewhere.

Unless yours is leaking I wouldn't bother personally.

https://www.ebay.it/itm/Yamaha-DT-125-R-Wasserkuhler/254775187149?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20160323102634%26meid%3De28a135d13374a9191e1f0245e9bf5e5%26pid%3D100623%26rk%3D1%26rkt%3D5%26sd%3D254541640932%26itm%3D254775187149%26pmt%3D0%26noa%3D1%26pg%3D2047675%26algv%3DDefaultOrganic&_trksid=p2047675.c100623.m-1

That's in good nick.

I run Yamaha DT 230 Lanza radiators on mine.
https://www.ebay.co.uk/itm/Aluminum-Alloy-Radiator-Fit-YAMAHA-DT230-Lanza-DT-230-Braced-Cooling/283565759760?epid=24005913216&_trkparms=ispr%3D1&hash=item4205d61d10:g:nnIAAOSw8OJZxaQG&amdata=enc%3AAQAFAAACgBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickk7PdDazAlGltMLJlUhrWsD%252BjagP3n2Wi2PP9H9bbty9tutqQhgUmp1bIIgObaPKvnRq4qjzkap19sQdRTMu9RsbKpgOEVg6judcuJ%252BAHjAPfwndPt2UyhP9oq%252BbS3hhJb1rHgOsNIry65rbCclIYXgf6WWcSTo7cJsTU5YRYaFdcFXLgqqsuXpLYsUYIm%252FC6dlsKTMXMUTRV%252BnSQmj10OesINYxpgS6H7NTYxgsYLF2EyKOE37yFlUqtWX%252BRHlmgywLwPqviCVEl2dlG5RlLst%252F9DwPge91S%252FQY2BgV1oqtgxadVjsCb5e9hw4Z0CfqZfRU1eHFZ3XsG%252FEDlFyZyHNDFR0G4zeUAuorzqL75lG7iMwdH2d7PigRQ6mtznOa4Vx40U%252BqXUPlpONHAazOLIsrypvLdnu%252Bf%252FNP08T7kujfukpU6OrOKhJoMrx%252FKbcyi4sVPHsM83%252F4W%252FFnUjGb%252F9juoi%252BwTcRJoyDKRlw7yhgAgFgLK0grurIiH9mbJTxBdCAwTKtuAICp27kxK2dGFQ2LIp6lNXP0F8caZmV1d5oohMWHxw3S7mo3g2OKUOGpwArBn9K6BYa5EiDTpg%252FHsSXeymS5N6AkMX%252BjrCjgjbjMQgZlMfFvt0xhilCkX26VkHJKgQ8ZJThio6W%252FGnRAX0it1NwnJty%252BuyoLGAe0Me%252FalaqhqqkjNvdw6AecMels%252F1zCH9NRDeffBkr9Wrd8sn4vTPsVUTO6EWwd6omaNnkIo8lygPJ4h37NUwigXDDncXr8nrLBAg1CBXDglm2Ggnjn4svzJ%252FWz7OEneJE6BC%252FMU%253D|cksum%3A2835657597609950dcfdfe2046e3839a1ef6d5214f1b|ampid%3APL_CLK|clp%3A2334524

You can get new radiators for those, just need the brackets.

okay thanks!

@bigbob said in Clutch basket:

gpx moto tse250r

I'm not aware of anyone who has done this.

That's interesting that the clutch basket has failed.

alt text

I really dislike Chinese stuff because of their quality.

But this looks really sweet.

Shame about the clutch basket.

@SpookDog Yeah hard to say really. My RS runs at about 60 and my RE can run as hot as 100.

Some 3bn engines have slightly different inlets, not where the manifold bolts on but inside. The internals have different dimensions that I can only guess is supposed to help flow to the ports...

@jonne123
You bolt it to the flywheel, then insert the centre bolt and tighten it. You need to of removed the centre nut first though...

@SpookDog
Okay, thx! Ordered new gasket online and will try and install next week.

@Calum

Sheet, my bad! I still think it’s the kickstart throw out gear. If you hold down the kickstart and it doesn’t make any difference to noise...

@finchfocker
I know! Don’t worry! I get uppity when I drink more than 4 special brews 🤪 I was just being a dick 👃🙂 So take no notice of me after 9pm!...

We all love bikes, 2 or 4/‘s and the variety is a good thing...

@lllDennis So my rebuild consisted of Stainless as it's cheap.

I just got all the bolts for the engine from "Raceti" and that cost me £145. So it's not cheap. And I'm sure you can appreciate there are a lot more bolts than just the engine.

The thing that hurts is when they rattle off! 🤣

@SpookDog

Seriously! That’s not normal is it? I ended up cutting and filing back the right side casing to match the other side...

So leave the carburettor and oil pump cable alone, the cable from the junction box to the throttle tube is like 50cm long (if that). That's the only one you need to worry about.

I run a YZ85 throttle tube on my DT.

@SpookDog

If you take it apart, use a drop or so of bearing/thread lock to secure it properly...

@SpookDog
The bike is a 2007 model

@james said in Difference tzr125 and dt125:

@Calum hi pal iv dun a lot ov work on it with the tuning and its cost me in the long run but I love it it's an 1989 model how do u up lose a pik

I’ll save Cal the time of explaining how to you, I owe him that much at least 😂

make imgur account upload the image you want to share on here on to imgur once the photo you want it share has uploaded to Imgur, go to share it and copy it’s link press the little image button you see at the top of the screen when you type and then paste the URL of your photo from imgur

Happy days!!

@SpookDog
Yea I know, but I have a local shop that’s got all kinds of bearings and oil seals. So I just wanted so see if they had any who fits my engine. Then I don’t have to wait for delivery and etc. But do you know which ones come originally?

@james
Thanks for the tips!
I have a spare engine that I will swap it with in the meantime.
Thanks to everyone who have helped!

I wouldn’t worry so much. If so keep the pre-mix. Otherwise put the clear tube on, see the flow and trust Yamaha 🙂