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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
 

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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.
 
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