top end job

Joined
Aug 3, 2002
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#1
need some help guys. what are you're thoughts on honing a nikasil (01-cr250) cylinder when doing a complete top end replacement? is this necessary? thanks.
 

DKT735

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Joined
Mar 16, 2000
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#3
It's best to hone the cylinder. It will take all of the unburned oil and other varnish off the cylinder and help the rings seat. I generally hone the cylinder when I rebuild the top end.

On the other hand I've also done top ends where I was either to busy or lazy to properly wash the cylinder after honing so I didn't hone it. The bikes always ran fine and I didn't notice any power difference or excess blowby when the engine was torn down at the next top end.