Got a scorpion pro 90/90 21 front and a stock size dunlop geomax mx51 for xmas and finally got them mounted up at the track yesterday.. I gotta say i really like the dunlop a lot. It hooks up really nice and really does what you want it to. I really recommend this tire. I really got these tires more for off road trails so i really wanna see how it handles there but gotta wait till snow melts. i like the scorpion pro front also. I dont love it but i would say it seems to work really well. Just like others have said it seems to wanna wash a little but you notice it happening and catch it to correct it. Sorry this is not the most technical review but i am a kinda noob rider so i thought i would share my info since tires are always a big question.