I was wondering what other models sprockets would fit the blaster and what sizes i could go down to on the rear and up on the front??? i realized the back sprocket bolt holes are very close to the teeth and i am pretty sure you need a different sprocket hub to get a smaller sprocket in the back and i was wonderin where i could find one or what other models have rear sprocket hubs that would fit the blaster??? Hope someone can help..

 

I've seen honda sprocket hubs fitted onto yamahas for the same reason you're mentioning, the design doesn't allow for a very small sprocket. From what I remember (I could be wrong so do some more research first) it was a 300ex hub, and they had to file the teeth down slightly to get it to fit over the splines. The number and spacing of the teeth are the same, honda just designs their stuff a little better than yamaha (in my humble opinion) so the teeth are deeper.