Anyone know what the RA finish is on the newer twin cam cylinder is?

[todd10]

The head mating surface looks and feels like a fine file. I've been told that the moco calls this their micro finish?

[DBC]

The Ra should be about 10-20, it should not feel like a file

[Hillside Motorcycle]

We finish our cylinders here with a 400 grit and then plateau hone.
Scott

[todd10]

Here's a pic of what the cylinders look like. Someone must have went to lunch before finishing the job. Then came back and boxed them up and sent them out.

http://i412.photobucket.com/albums/pp202/myguns10/20140303_085042_zps26cb4ab5.jpg

[rbabos]

Here's a pic of what the cylinders look like. Someone must have went to lunch before finishing the job. Then came back and boxed them up and sent them out.

http://i412.photobucket.com/albums/pp202/myguns10/20140303_085042_zps26cb4ab5.jpg

That's the top head gasket surface, not the cyl itself.
Ron

[Admiral Akbar]

Here's a pic of what the cylinders look like. Someone must have went to lunch before finishing the job. Then came back and boxed them up and sent them out.

http://i412.photobucket.com/albums/pp202/myguns10/20140303_085042_zps26cb4ab5.jpg

Don't look too bad for a gasket surface..

Max

[Olivepearl]

Depending on what the HG manufacture recommends...but Cometic recommends a Roughness Average (RA)of 50 or finer for head gaskets.

Robert