DT125R FORUM

Oh nice! Have you got any photos?

Thank you! Then the newer snorkel will not fit the Keihin..

I have the 170kit but the factory head volume was 12.5ml,I went up to 13ml.
0.8-0.7 squish is way too low for the cc of the kit,on high rpm that may become 0.6-0.5.In my tune to be on the safe side the squish is 1.2mm
A good design gasket is that of the DT200R for the kit.

I have the Dellorto VHSA 32mm Carburettor as found on the Rotax series of engines. I originally source a 4DL carburettor and saw another VHSA on eBay. I made a very good one from both of them, thinking at the time they were the same. They were not and therefore jetting on my DTR is WAAAAYYY different to that of the 4DL VHSA.

All I will say is, jet to suit, what works for my setup (bearing in mind how unique my setup is) may not be good for you.

But in essence, it's like a 140 main jet with a U13 needle (IIRC) But I bought the whole range. I don't run oil pump and have advanced the ignition + ported barrel with VForce4 Reeds and airbox delete with an underslung pipe. All of those will have factors on jetting so kinda take my setup with a pinch of salt.