DT125R FORUM

@Calum I think it was a false alarm, I went out to the garage today and it's cleared up

@BalnAndCantGetUp Yeah, the problem is, is the way they are and what are you have are two different things. The way Yamaha intended the machine, and the way it ended up varied from its release in 88 to its discontinuation in 2007. I am merely recommending putting it back to how Yamaha originally envisaged the machine makes a lovely bump in performance with minimal degredation in reliability. So in the DTRE/X they put a huge honeycombe restriction in the exhaust expansion chamber. They gimped the YPVS to retard post 10K RPM, and the reeds are just a nice to have as they're cheap and easy to fit. That's all I was getting at. I had/loved mine in stock trim for a good while before I started fettling with it.

For you guys in the UK: https://www.gpxmotouk.com/shop-gpx.html They have the parts to convert the DTR to 230cc, can probably get the complete engine too. If I was thinking of a engine rebuild and/or Athena 170, I would go for this instead, based on what I learned from the Athena 170 kit.

Ok, thank you very much for the help. I am going to try some things. And pressing out the steering stem is a good idea, because the dt stem is 30 and the Husqvarna 25 so i can just mill the 30 mm stem to 25 and press it in. Thank alot.

My Dad did this on his VW Split Screen van so that all the doors used the same keys. He just spent the time and recoded the barrels on the lock that matched the genuine key. You'd need to be familiar with how locks work etc, but if the the barrel is dismantleable, or you can find a barrel which fits, then it should be possible.

Hi Andy! Fab! My Dad has a DT400B that he's been in the midst of restoring for about 8 years now. I think he has all the parts, but he's since moved on to a Vespa and Lambretta obsession! But I'm hoping he'll throw the DT400B back together and talks of passing it on to me [image: aeJ7dpP.jpg] [image: WYp7ieO.jpg] This is predominantly a DT125R website, so knowledge about early models is very limited. But of course we're all motorcyclist enthusiasts so we welcome any bike really. Although, admitably, traffic has plummet in the last 12 months.

Yeah looks like it's in need of some TLC. When the bikes in neutral all the lights should be on. As I say, that bike looks like it's got a lot of issues and working through those by restoring it to factory is what I'd do.

https://dt125r.co.uk/topic/13/kick-start-conversion-dtre

@Stensar Doubtful as he hasn't been online for 6 years.

Can any one please tell me the width of the rear hub on a dr 125 R as I would like to fit disc brake hub to a xs 650 . Thanks

First I want to give immense thanks for this thread! What was an opaque mystery fast became clear when I learned about 2T Exhaust Calc. Are there any default (stock) engine data online to be found somewhere, or do I need to disassemble my engine and do all the measurements myself..?

@HOTSHOT-III Glad to hear it, your help is invaluable.

Cheers buddy, I'd searched and just turned up gibberish that confused me even more, but once I ignored all the threads claiming the pulley rotates clockwise for PV opening, and set the cables back as they were supposed to be (1-2, 2-1) it all made sense again - it must turn anticlockwise viewed from the LHS to open it couldn't work the other way! Anyhow, it's all up and running and I've fully re-dressed her and given her a wipe over and a run up and down the road. All seems well enough but it feels like the PV opened more and earlier before I tore it down and serviced it, I think it had been adjusted from the normal peg-in-hole alignment perhaps, but it's al good enough for now and if I want to tune it a bit differently for preference at least I know what I'm doing now! Time to ride it some more whilst I think about sorting my carb tune properly down the line. Cheers Calum!

Thanks Calum.

@Calum thank you so much

Just push the piston back into the caliper. Make sure you undo the reservoir first however. I don't think there is anything special about the way the front brake pads go in though. It's been 10+ years since I've remotely looked at a DTR caliper but most calipers are fairly self explanatory.

Merry Christmas and a happy new year,wish you good health to all, everything else is obtainable.

Thanks so much, I managed to figure it out but Now I'm dealing with my own front brake problems haha