SO, got a 66cc Skyhawk, strapped it on (tight fit; not a lot of space for the air intake, and I have to loosen and tilt it to get the sparkplug in and

You should be able to turn the head around 180* and the plug would then be easy to replace.

Cool frame. Did you add that gusset near the head tube? looks beefy!

Riding without brakes is retarded, but the bike looks cool.

The brake that came off the front should probably go right on the back, if there is a little cross-bar or tube with a center hole (also for rear carriage rack). If not, looks like you could easily weld one, or even better, put v-brake tabs on frame.

http://www.niagaracycle.com/product_info.php?products_id=10066

Yah, just got a cross-piece welded on the front, so I mounted the front brakes. Still got to do the back...

Yes, welded a bracket on the front-tube: I was worried about the pressure on it.

Still tweaking stuff, repainting it and finding a way to get all the wiring nice and neat...

Thanks