Teazer, do you have pics of your TZ's on the web?? Would love to see them...
As far as the o-rings for the heads, I was having the surfaces refaced and Scott C suggested that I change to o-rings to help with the squish. I said sure go for it as it wasn't much more cost wise. I sent him an email today asking about the advantage over the copper gaskets. Quote:
"The O-rings are silicone rubber, you could also use Viton. You can get replacements if needed from a Parker store or other suppliers like Mcmaster-Carr, # 2-039, or I should have them in stock. They conform better to any irregularites, and can flex and adjust like piston rings. I've been doing more motors that way, and they have worked very well, even in the roadracers.
Also, with the thick 350 gaskets, we can't get the squish down as tight as desired, a minimum of about .055" compared to .030"-.035". Eliminating the gasket allows the squish to be set as desired."
Most all liquid cooled 2 strokes I have seen use o-ring heads...and if the orings work the same or better then that's great b/c they're alot cheaper! 8)
All I need is a reg/rec and throttle cable before I can fire my bike up. But too bad it's like 9 degress here in Ohio. :'(
I installed the Dyna the other day, still need to time it. My buddy has a dial gauge with the correct adaptor...I should have done that when the motor was out of the frame...oh well.