1934 Blue Star inlet valve oil feed and oil pressure gauge pipe diameters

[David Samways]

Could someone tell me the diameter of the pipe that feeds oil to the inlet valve and that which connects to the oil pressure guage?

Thanks, David

[Bicycle repair man]

On my '35 the valve guide pipe is 3/16 od and the oil gauge pipe is 5/32. The rear pipe I am reasonably confident about being right. The oil gauge was a bit of a guess judged upon the squashed remnants that were in the union on the timing cover.

[David Samways]

Excellent. Thank you BRM.