I'm not making fun of your spelling, but every time I see the topic title at a glance, I think it says 'More Clutch Whores' and think what the hell is that about..
That is pretty high compression for 21cc domes. I would run at least a 50/50 mix although the money you save over 100% probably won't amount to much particularly with pump gas prices right now. It must be the pistons or thinner base gasket. Checking your squish clearance would probably be a good idea also.
The dome size depends on several things: Elevation, other mods, fuel to be used, porting, what kind of riding you will be doing, and a few other things. Since your crank is welded, that won't be a limitation.
I wish I could think of a way to take PD heads in on trade but I don't know what I'd do with them. There's nothing wrong with them but my heart wouldn't be in trying to sell them.
I wasn't fortunate enough to make it to Roostfest but if I had, I would have definitely preferred the BHQ camp. Even when I was beginning to get hair on my face, which is where the other camps maturity level appears to be, I would have preferred the intelligent company of the BHQ group. And come on, does anyone with any brains at all thing the BHQ camp was full of slow Banshees?
I thought I was going to be able to make it but things went nuts around here. I'm glad everyone had a good time, I just wish I had been one of 'everyone'.
I'll probably have a used head in here in a couple of days. I can't sell it quite that cheap but could probably sell it for around $200 with domes and shipping.
Yes I have them in blue anodized but won't have any available until the first of next week. I sold out but have a batch of them at the plater right now.
Pro Design domes will work in the head.
-David