DT125R FORUM

Thanks for the reply’s gents but I’m afraid I’m going to ask more questions haha..
I’ve got some main jets on the way as I think the problem is it’s not getting enough fuel, I changed it from the 210 that came on it to a 260 to match the 5dp39 buts it’s still too lean, I was going to just revert back to the original set up but it turns out I’ve lost the original 5j25 needle and they are like rocking horse shit, I can’t find one anywhere. So if that doesn’t work I’m on to a new carb. Taking onboard @calum suggestion I’ve been looking at the Dellorto VHST 28mm but wanting to stick with a MIKUNI I’ve also been looking at the Tm30.
Now here comes the questions,

1. Given the Tm28ss has slanted intakes will a carb like the ones mentioned fit okay as they have straight intakes?
2. Is the tm30 a valid option?
3. Is there a baseline/recommended setup with jets and needles for the VHST and TM30 for the Dtr ?

You’ll have to bare with me this is the first bike where I’ve had to deal with carb issues and I’ve been thrown in at the deep end

Thanks for the quick reply’s and knowledge mate much appreciated

Thanks for the reply mate, like I said the carb has seen better days and you can’t find the tm28ss anywhere I’ve been playing with the idea of getting a new one if I can’t sort this,what’s the easiest/most common replacement carb people are using ?

Not sure this is allowed here I have also put it in the tuning section under carbs….. Bought my DTR few month back was lacking power in first and second gear, looked at the carb and it had seen better days so I decided to clean it. Put it back together and it ran the same. It came with a dep pipe so after some research decided to rebuild it with the suggested parts for the dep pipe. Put a 5DP39 needle in, 22.5 pilot jet and 260 main. Started with needle clip on the second from the top and it started well and idled okay but bogs and dies as soon as you put revs on. Since moved the clip to position 3 and 4 and still the same although slightly better. Runs and doesn’t bog with choke on. Another thing is the air screw is making no difference to idle no matter how far out I turn it even though I’ve just replaced that as well. Any help is appreciated TIA

Bought my DTR few month back was lacking power in first and second gear, looked at the carb and it had seen better days so I decided to clean it. Put it back together and it ran the same. It came with a dep pipe so after some research decided to rebuild it with the suggested parts for the dep pipe. Put a 5DP39 needle in, 22.5 pilot jet and 260 main. Started with needle clip on the second from the top and it started well and idled okay but bogs and dies as soon as you put revs on. Since moved the clip to position 3 and 4 and still the same although slightly better. Runs and doesn’t bog with choke on. Another thing is the air screw is making no difference to idle no matter how far out I turn it even though I’ve just replaced that as well. Any help is appreciated TIA