Piston
Big Bore Kit "S"

One piston with one piston pin 20mm and two circlips.

Siebenrock product.
Each original Siebenrock product bears this seal that guarantees the highest quality possible, consistently optimized down to the last detail.

Price per piece.

For the classic BMW two-valve boxer models with Big Bore Kit "S" or Big Bore Kit "S"Touring
R 100, R 100CS, R 100RS, R 100RT
Monolever models R 100RS (x), R 100RT (x),
Paralever models R 100GS (x), R 100R (x).

(x) = only permitted for motorcycles up to first registration 31.3.1994.