I have found a set f rear wheels advertised as 'Yamaha Fitment'
Now this may sound stupid but, would they fit the blaster? I was under the impression that there was no such thing as 'yamaha fitment' rears, only fronts.
Yamaha does have different bolt patterns on the rear rims of their ATV's.
Example, the Banshee rear rims won't fit the Blaster.
I would definity ask what they are made to fit or what bolt pattern they are.
You are looking for a 4/100 bolt pattern.
You can run the 4/115 pattern Banshee rear rims if you use Shee/Warrior hubs.