Originally Posted by Hillbilly bike
What clearances do you use on the old Ariel with exposed valve springs..
My list of specifications says 0.002" for the inlet and 0.0025" for the exhaust. Although I subsequently improved my tooling significantly with a ball head cutter, with my Neway cutters I achieved a seat runout of just over 0.001".

Originally Posted by Gordon Gray
I'm sorry doc but all that really proves to me is........the work was good enough.
Unfortunately, the breakdowns show me that my work was only almost good enough.