This really depends on the terrain you're riding on.
I did not care for the Pirellis that came stock on my 05 CRF150. I ride where there is lots of sand and they just didn't hook up very well in that terrain.
Switched to Dunlop D756s front and back. Good for soft terrain but also for intermediate. Many of the pros run them. They are awesome tires.
Not sure if you have one where you are but I bought them at CYCLE GEAR and they beat everyone's price by a mile.
P.S. I had those Maxxis tires on another bike and they were great too. But I have a set of Pirelli MT18s that I will sell you CHEAP if you want to try them!
