Anyone out there know where can get a

Could be wrong on this................but I thought that the early air cooled Gas Gas used the same motor as the JCM.......a call to John Shirt might give you a definite answer.

Hope this helps.

Martin

99.9% certain its a gas gas engine as well

I agree, from memory its the same motor as the air cooled gas gas,

Try pistonbroke.

They have a database of thousands of pistons and run the spec and measurements you need through thier box and see is they can come up with something.

01179412300

good luck