Piston Options

[rhys]

Does anyone know if you can fit a non Polini piston in a Polini Evo Reed kit?
Piston is 57 (56.945) must have single ring with peg directly opposite exhaust port above the inlet cut out.
Compression height I can adjust within a few millimeters with packing.

[jonnysnatchsniffer]

yes gran sport do them, with 2 different compression heights which can be quite handy

[tzsteve]

KH400 piston, the work horse of the 70`s and 80`s.
just run the top ring

[rhys]

I put a standard Polini two ring piston in it in the end and it fitted fine, pegs run between transfers and boost port and bottom ring is just above inlet port at BDC.

[tzsteve]

success