I need to replace the rear tires on my sons 2000 Yamaha Breeze 125. I was looking at the Kenda Scorpions. He has mainly ridden around our yard and small trails with the stock tires, but they are about shot. I plan to take him out to ride some more advanced trails which may get muddy this year. I am hoping to get by with just replacing the rear tires. Any suggestions? Size is 22x10x8. Thanks