Hey guys I dont know if this is going to be in the right area but it can be moved if needed, A bit of help also needed on the correct head for my Model 2 engine #94828 as from what I can tell from looking at others it has the wrong head on it as the spark plug comes out at a different angle, it also has cast into it a couple of threads like for a cowl to screw onto, maybee from a later model 125, did the 125 heads change from the Rotomos to the Model 4 & 5's? I will put up a couple of pics so you can see what I am talking about and the difference in the mateing surface where they meet the barrel, the model 5 type head is round and the head on my engine is square.

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if my theary is correct, at what point did the change of heads come about?

cheers.

If you dont make a mess you aint making anything.