Hi All

Apologies for the following strange request:

I have just recovered a 1980 DT from a barn - I bought it off a mate who was emigrating more than 30 years ago and it has sat there since. Remarkably, I think it could be resurrected. My 17 yo lad is keen to do this. Problem 1 (there will be more, I'm sure), I can't remember if it is a 125 or a 175 (The V5 disappeared years ago and there are no capacity decals on it). Is there anyway I can tell from the frame number or do I need the engine number? I assume it is the frame number on the headstock - it's a bit ropey but I think it is 02168?X?.

I believe that 125 and 175 parts are pretty interchangeable, but clearly as a learner at 17, its important for my lad to know.

Any initial thoughts?

Many thanks

175 has a 6 stud cylinder head, 125 has 4 stud...and for that matter it will have the capacity on a casting mark at the bottom of the cylinder, for example 171cc

Welcome in " post up a picture,,

Thanks Airhead - I'll have a better look when I get it cleaned up.