i confirmed a "new find" piston that will work in the 66cc stroke and with a reed valve only.
- Less friction/reduction of cylinder wall wear by 35% or Greater.
- 1mm thick chrome pated piston rings instead of 2mm thick non plated.
- reed windows in piston for reed valved engine only*
- wrist pin bearing stays put no "walk
CAN ONLY BE USED ON THE ENGINES WITH THE "SHORTER CON ROD" 110mm