So I buy my bike and the only thing wrong is the single set of keys I get with it. I decide to 'do it right' and buy the yamaha dealership blank key. First mistake; it's $15, you only get one, and they don't cut on site. GREAT! So then I get 2 more blanks on Ebay with shipping for the cost of the singe I bought. That was my second mistake.
I got the new key blank cut at a locksmith, and I find through the chit-chat that the same key can be bought through him for about $4.00. SH*T!
Lesson here: Go to the locksmith and buy 'n' cut your new set of keys there. The new key works fine; the lonely guy at the locksmith can use the business and please let my mistake be your lesson.