I've just got my 1st bike- 1993 TDR125 Belgarda / Italia which has the DT125R 3MB engine but with a Dellorto PHBH 28 carb.
It's in need of a rebore as it's soft seized a few times and the clutch slips in 5th, other than that it's great fun. I read on here that a DT125R rear shock will raise the rear slightly- the original Paoli setup is now quite soft and I'm well over 12 stone so it's got to be worth a try