Holiday weekends are a blast! If you don't plan it right you'll be one of the ppl complaining about holiday weekends. If you need holiday weekend advise pm me.
As for least busy April 1- before memorial day and after labor day weekend till Halloween. Summer time weekends can be hit or miss but not bad at all.
I have some Honda hubs that fit a banshee axle splines. Not sure what they were off of but like john said I used to leave them bolted to the rims and just take the big axle nut off to use the hub & wheels
ive been riding on a cylinder that had the cir-clip pop out and make two grooves on the cylinder wall, pretty deep. I bored to the next size(not because of that but because they needed to be). the two grooves look awful but they are below the exhaust port and doesn't affect compression or ring life.
take a picture of the damage OP, maybe its way worse then what you describe, maybe its not that bad at all?
for what its worth. I had one of these cylinders back in the day. vitos 392 monoblcck unported, vito fat bastard pipes, 130spi, 34pj carbs, 0* timing made70hp. mat shearer had one that he ported for a 4mm making it a 421 that made 114hp.
im not sure you know what your getting. a "12" port cylinder is a stock cylinder with triple exhaust ports and 2 extra holes jim makes in the sleeve.
a stock cylinder has 8 ports.
a cub cylinder has 11 ports stock.