Grinding raves for 83 mm pistons?

[xpinaz]

How do I measure the gap? Is their a set amount to take off for the 83's?
I know the book says to measure at the center line of the cylinder and what the gap should be but not how to measure it.

Jim

[Technical Support]

You measure with the valve and piston in the cylinder, with a feeler gauge.

[xpinaz]

From the top right??

Jim

[Technical Support]

Yes.

[xpinaz]

DAM! I just got the head centered and even squish all around. Atleast I remembered before
I started the thing.

Thanks

Jim

[Bill O'Neal]

A one milimeter oversized piston needs .020 removed from the rave valve. ( half of .040 ).

Dial the calipers to .020. Using the pionty ends of the inside caliper, scribe a line on the rave valve. Using a half round file, file the vlave down to the line. Smooth out any rough edges.

[ March 10, 2004, 10:32 AM: Message edited by: Bill O'Neal ]