suprised that Andy hasnt jumped on your balls for posting a question about 4 strokes !

Well it is a Honda, and where else should one ask for nicasil expertise, than in a two-stroke forum

If you ask in a diesel forum, they'll only tell you about oversize rebores and insertion of new sleeves etc. they are not on the same level of development as our two-strokes.
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Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom