has anyone tried this. I was thinking of the wiseco 739 overbore. *does anyone have any comments on that? Thanks. http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

The 740 big bore is a common mod it seems...talk to Krusty...he's actually selling a complete 740 engine. Make sure you learn how to treat that engine after you mod it though http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/biggrin.gif

Solid motor. Don't know about the Wiseco's though, I used 800 Rotax slugs. I'm sure the Wisesco's would work ok if you started them at 6 or 7 thou. clearance. You would also be able to use your head. With 800 pistons you should run a head to match the flat-top's. Also need 46's to let it breath (at least 44's). My 740 is in a box heading to the US. Any more Q's let me know.

Thanks guys..I have use of cnc machines for this and was not sure how well that mod would work..Thanks again! http://www.snowmobileworld-s2.com/forums/iB_html/non-cgi/emoticons/thumbs-up.gif