Thanks Jack and voljon

Can we then presume that the 79cc motor had the sloping fins on the cylinder to difference them from the 98cc as the crank case stud Patton for the cylinder is the same as far as I can see and there are no markings to indicate the cubic capacity on the cylinder?????

Thanks for the info the more we fiddle the more we learn

Regards
Andy

If it don't go its not good.