About to replace the front and rear tires on my YZ400. Going to try Dunlop 952 front and rear... I noticed today that my bike's previous owner put on a Pirelli 90/90-21 in front. Thinking about going back to the stock 80/100 but not sure how this will change my ride. I ride mostly technical woods trails - a lot of tight, rocky areas with some sandy stuff mixed in. Anyone else running a 90/90?