The same sort of money that usually gets you a humble cast iron cylinder will buy you a very robust plated Stage6 aluminium cylinder here.
A comparatively tame exhaust port timing together with a huge port area make for an extremely torquey kit which will also rev very nicely. There are not many cylinders powerful enough to stand the Pro's pace off the line.
A reliable cylinder complete with high quality piston, a set of carbon reeds and a choice of base gaskets to adjust squish clearance.

Liquid cooled version for Peugeot upright engines

Use BR9ES plug with this kitStage6 Part No. S6-7017501

• 50cc Speedfight 1,2 liquid-cool