Whilst admiring the R Wossner pistons from the order organised by Jim, Many Thanks again Jim
, I noticed that the pistons differ slightly from the worn ones fitted when I bought the bike.
Given that the bike came from an importer with no UK owner up-to that point, and from the state of the rear tyre, I wonder if it had seen an amount of track time and hence the differing pistons that were fitted. Could these be SP pistons or possibly just a later R piston perhaps?