Top end rebuild

[mattt]

I'm about half way thru a top end rebuild on a 93 CR500. Recently got the cylinder back from machine shop and have new piston and parts. Any do's don't's or change this since you're into it now anyway?

Otherwise, a stock rebuild with new O/S piston & Honda gaskets is what the plan is currently.

I'm all ears for opinions, suggestions, must-do's, and don't bother's.


I'm second owner of this 500 since 1995 and rode it mostly at the dunes back in the day. Going forward I foresee more desert riding over the dunes as our former dunes riding group has dissolved over the years.

Thanks.

[Banater]

Matt, You might want to verify the cylinder port edges have been properly chamfered and have no sharp edges. I like to go over the port edges with fine emery cloth just to be sure. Also the exhaust port bridge must be relieved after the cylinder has been bored.

[mattt]

Thank you for the suggestion. I will check that before final assembly. It was discussed with the machine shop prior to him proceeding with the work.

[mattt]

I'd like to hear opinions, both good and bad on the MSV exhaust flange. Thanks.