i'll do some next month i've not had time on the lathe since before xmas, once i've got caught up on filling log stores and had my first fishing trip of the year i'll be building parts stockback up
i convert old pistons to take a new head or make them from scratch
Can I ask what advantage you get from the flat topped piston and valve arrangement?
it eliminates head space and a greater percentage of the swept volume goes into the valve
Thank you, will probably do it with the 1377 I’ve got, if I ever find the pump tube or are able to buy one.
Looking at the three series I look to have a series 1 trigger frame and a series 2 BB barrel and breach. The bit in the middle, who knows, I can’t find the ruddy thing!
it'll be a late phase 1 as only the early ones had a steel breech (late 79 i believe they started fitting the plastic breech),later tubes will fit but you'll have to notch the pump slot or use a later pump lever