Thanks for the advice - I'm just kind of hoping it'll be fine as is. I've had a lot of experience tuning Brit bikes and have found most of the time the recommended increase in mains (with the usual breathing improvements) aren't necessary. Being above sea level probably makes the enrichening thing less of an issue. The serial is 1036780 and the bike originally came out of Edmonton. It belonged to an old neighbour and good friend of mine who died a cuppla years ago and his wife left it to me knowing I'd do something with it. I'd always wanted a CB back in the day but never got around to it. The neighbour (Mike) had bought it used and ridden it all over the planet until it "siezed" on him (by now we're probably into the 80's). The bike sat in his garage for years until I agreed to look at it and see what it needed (now we're into the late 90's). The cam had snapped clean in two at the chain sprocket (is this common?). I offered to take it off his hands but Mike'd have nothing to do with it, so it sat again, in pieces, until his unfortunate departure to the big breaking yard in the sky two years ago. The upside is that it was always stored in a garage, and it was still in the labelled Clamato cans that I put it in when we tore it down. I brought it out here after the funeral and didn't get around to working on it 'till last fall.
I digress, though - back to the rotor. Is the lightening thing a good idea? I don't plan on drag racing it, but I'd heard that under hard use the cranks can snap due to the weight of the thing, but I don't recall knowing anybody that this happened to and I knew some guys who rode their CB's really hard.
I live up in hillbilly land between Greenwood and Grand Forks, by the way. It's good to know that there's a couple in the area. I don't know anybody with a CB around here, at least that's on the road.