Sunday, 17 July 2011
The piston got torched previosly, I had trouble finding a replacement as it had a long rod high comp one in there, any b series owners may know that most stuff like that is for the short rod later versions. I managed to track down a +40 piston at a sane price from Petes classic bike parts in the Netherlands. The previous piston was a strange one as it was an actual BSA piston (not Hepolite or etc), and since getting this new one I now realise it was like 8:1 cr, wheras the one I got to replace it is 8.5:1. Hope thats not going to cause problems!.This one is a MC cast piston. It has a skirt seperation slot which the other one didn't so hopefully that will make it less likely to nip up.