So it turns out that not only are my sprockets and chain all shot, but that the reason behind the damage to the chain/sprockets was that the rear wheel bearings were also toast, causing the alignment to be all screwed up. Ugh. So now I'm in well over $500 for repairs, plus over $300 for the tires I had installed...OUCH!!!! I was hoping to spend about $1000 this summer to buy an older CB750 for a cafe project...looks like I'll be using said $1000 just to get the CBR ready for the trip to Seca. Bummer.