Oil Fill/Overflow Plug Sizes

[KJDonovan]

Does anyone know the size of the fill plugs and overflow plugs on the top of the engine for a 72 JackPiner black engine?  They look like 1/2" NPT but I am guessing they are metric pipe thread (BSP).  I getting ready to put the bottom end of my project bike back together and I have been replacing most of the visible hardware with polished stainless and would like to do the same for these plugs.

Thanks,

KD

Kevin J. Donovan
Foster, Rhode Island

[Merlin]

...............24 X 1.5 MM straight thread.............

[KJDonovan]

Thanks Merlin

Kevin J. Donovan
Foster, Rhode Island