Before I set them the valves where at about .025. I have the OS valve adjust kit that has two shims. One is .004 and the other is .01. You should be able to fit the .004 and not the .01. They are now tight on the .004.

When on the Funtana I tried a APC 16X4W and on the test stand Im using a MA 15x6.

Fuel is Omega 15% I understand that this engine likes 30% 20/20 fuel.

OS F plug

Thanks
Andrew