If the chain DID rub on the swinger, I suppose there's always the option of going with larger sprockets fore-and aft. Seems like plenty of room before it rubbed on the top brace. Probably a more worrisome point to rub, but still loads of space in there. Maybe just a couple more teeth up front, five more out back ... might be a tough set to find, but do-able. Just sayin' if a person were concerned that a set-up like this was unsafe because of chain rubbing, well it's still a relatively easy fix. A lot of the stock bikes had chains that rubbed, seems like a lot of CBs were designed to take chain rubbing into account, and all they had to deal with it was a little slice of steel judiciously and carefully lined up to hit the rollers and not the links, only that was in steel and not alloy. What I'm thinkin' is, whatever type of slider I put on my own arm, I'm gonna keep it in the roller area of the chain. Oh, and Gates power transmission, the guys who make those poly-chain GT carbon belt drives? They make some pretty damned small rollers. I suppose one could even use a small roller bearing with a tough outer race, mounted on a bolt off the engine block. Just my two bits.
Awesome bike, by the way.
-S.
