@calum Yes found that out to my dismay once - think they are 1mm narrower than the nearest commonly available bearing. Why wont these casings go back together.....

@calum old thread mate but can you use a 4fu head on a 3mb barrel? ive got a 3bn head on atm and wondering what my best option is and how much more power will i gain from a 3mb/4fu head

@jonne123 im also trying to find something that matches the original silver, my stator cover needs painting

@challenger Typically it's Rotax Engines, TZ 250 Engines and Suzukis. I don't recall there being any examples of road going bikes, but I read it in 2013 so a long time ago now. I have since read the collection of other tuning books he wrote, they're very good.

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. [image: GPX_TSE250R_Right34.jpg] 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