Top end

Barrels need new valves and guides. Important to keep the intake valve to stem clearances reasonable to reduce air leaking into the intake manifold.

I bought NOS valves from Canada. Guides, rings gaskets and spring I already bought 20 years ago. One spring was broken. Barrels are nickel plated.


NOS wrist pin/gudgeon pin snap ring/circlips were really difficult to insert. I made 2 special tools to help get these in. They are very high tensile making them difficult to compress into the piston.

NOS valve springs were noticeably longer.. new to the right.

Bores deglazed ready for new rings.