The 24R or 24S blank from Home Depot will work with a bit of work. It's a Ford key. It's thicker and longer than the stock one. The length isn't a problem, but they need to be thinned down a touch. I sanded mine on a belt sander and they worked perfectly. Jack said he got some Yamaha blanks that worked. I think he said he got them from Wally World, oops, WalMart, but you might also try a Yamaha shop and see what they have. The problem with the bike blanks at the shops is they usually want about $10.00 for a blank. That includes NFG. My dealer tried for months to get a blank from them and never did get one. Or he got some that didn't fit a G5. My Home Depot versions cost me about $2.50 cut!
Bare