Cruz_e_Silva said:You are talkink about DTLC with Minarelli engine, not the DT Yamaha engine that looks like the RD one.
I think it's possible to fit a DT80LC Yamaha engine (55mm to get 100cc from Polini or Italkit) in the RD frame but RD's in here are not like DT's so I can't confirm you that thought.
Dont know... I have just heard so many things...
But my own reasearch tells my this [Looking at pictures]
Looks like The DT50 - 80 & RD50 - 80 with yamaha (squar cylinder shape) motors are the same shape and would all fit in one frame.
The differens are:
From AC to LC the rigth cover of the engine are different. LC have waterpump there.
From 50cc to 80cc the crank is different...