1. Minarelli P4
The late 1960’s P4 is still kick only, still has the rounded case of the early 60’s, but the cooling fins are bigger and more square, and head fins are angled instead of straight.
2. Minarelli P4E
The 1970’s P4E has a not-rounded engine case. It has many versions; 5 different cylinders and heads, 5 different kick levers, 8 different magnetos, 3 different carburetors, and more.
3. Minarelli P6 1969-77?
This was a 6-speed foot-shift manual clutch. Most were kick start. Some mid-70’s had pedals, for sale in England.