Actually Armen, the dyno run was done after I installed the catch can.  So it makes just about 41 HP with the catch can mod.  It would be nice if I could install a check in the breather line and then dyno again, but I would have to be independently wealthy to work like that, plus I need a lot more free time.  Maybe I should buy a dyno and install it in my garage.

I don't think my current test regimen, 2nd gear pull on video, is sensitive enough to measure improvements as small as a check valve in the breather.  Who knows, maybe a check in the breather would result in a measurable decrease in acceleration time from 4K to 7K.  You can be certain that I will try it.  But I can't imagine it would be that dramatic.

Since I have it all torn apart to fix my sucked out cylinder base gasket, I looked over all the particulars to see how it's holding up.  I've put right about 1000 miles on it since I did the mods to increase compression and tighten quench.  About 500 of those miles have been real torture on this engine.  It has seen a ton of WOT operation.

The cam chain tensioner plunger is still right at 18mm.

The front & rear chain guides look fine.

The piston crown looks good too.  Also no signs of detonation.  Same light coat of carbon just like the combustion chamber.  Valve reliefs show no sign of deformation.  Looks like the crown can take it.  The underside of the piston looks good too.  Nice and silver, no indication of coking or discoloration, so it's not getting too hot.

The special tensioner plunger is lookin good too.  No unusual wear.  It does have a bit of a polish on the edge, but overall looks just fine.