680 compression

Just wondering what i should be getting for compression on a 650r with a 102.4 mm 10:1 compression wiseco, with nikasil cylinder? After my rebuild, i am paranoid about everything.

thanks

bump. anyone?

102.4 mm 10:1 compression wiseco, with nikasil cylinder? After my rebuild, i am paranoid about everything.

thanks

That's basically what I'm getting ready to do with mine ~ I'll be pulling it apart in a week or so. :prof: Ask Mike Powell, as BWB63 says that what he's done.

Has it been run and broken in yet? If not, the compression will probably read slightly low.

Under absolutely ideal conditions the maximum pressure you could see is something like 173psi(calculated). Since nothing is ever ideal and the cam timing events come into play, I would be looking for a pressure in the high 150s to mid 160s. Sorry I can't contribute actual measurements from an engine.

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