Maddog,
If they are only used as toys... don't forget about having to keep them on the pipe, jetting changes with the weather, etc. Don't get me wrong, the smell of two stroke smoke gets me going but to think of one to use instead of my SD, just isn't going to happen. I still have my RZ 350LC, (miserable bike to ride if it's not ridden in anger), and fondly remember my old 750. Rz might see track time as a disposable.
Nice H2 though...Remember hearing a bike for about ten minutes before it showed up while sitting in Halifax harbor. H2 in H1 chasis, Z1 swing-arm, H2 rear wheel in front, Z1 in the rear, Motor drilled to Swiss cheese, white chambers, and one piece FG tank/seat/fender in grabber green. Awesomely loud and rude thing. totally shamed my water buffalo. It really impressed me.
TZ750 in dirt track frame .. I might consider a trade with the SD.
Will