Stage6 Piston (A) Sport Pro 70cc 46.95mm Minarelli vertical (Yamaha BW's / Slider etc.), spare piston for Stage6 Sport Pro 70cc cylinders.

When you start noticing a loss of compression and / or power, it's time to replace your piston with a new one. This piston is the original spare part for the Stage6 cylinder, available in several sizes (A, B, C); the differences in size are tiny (0.01mm) so either get the same size as the original piston or one size up or down.

This is the size A piston, d = 46.95mm. Including piston pin, piston rings and circlips.