Irristeve - good info. I've read a little about the issue with the cam chain fitment, but not enough to know if it is/was a problem on all the 750 kits, or just some, or some particular cam chain manufacturer or cam chain guide compatibility, or just individual wrenching skills... kindly post back your results.
Racerdave - If you get the time, it's worthwhile to peruse the Mos2 stuff. 5 to 10 times the ...slipperiness of oil, stable up to higher temps than our engines will ever see, really thin, and really hard. As I indicated a few posts back, I'm not sure how much the extra slipperiness compensates for the higher loading on the shortened skirts. Hopefully some others can/will chip in regarding how many miles on their Mikes/Wiseco 750 kits they have, and if torn down, what shape were the pistons. Irristeve indicated his looked good, but that was only 15000 km; call it 1000 miles. If I can't get 20,000 to 25,000 miles on an engine with a 750 kit (and oil cooler, regular maintenance, etc), then I'm going another direction. I'm simply looking for old school, reliable, somewhat classy, with a little more performance, daily rider. If I wanted to wrench all the time to maintain a high performance bike, I woulda bought a KTM...
While the 700 upgrade with stock barrels would solve the cam chain issues, the enlarged fin area of the 750 kit is enticing; and 100% functional. A long time ago, I went from a 650 Triumph Bonneville to a 750 Norton. That 100cc difference to performance was definitive. IMO, the money expended to performance gained ratio of the 750 kit is better than the 700 kit; assuming it is just as reliable, or really close...
Regards.
Edit - Looks like Two has resolved, I think, the cam chain issue. Hopefully this will assist Irristeve.