can anyone help me find any upgrades for this engine and a set of tires bigger than what i allready have. i just got it and took it out on my first ride, i was freaking awsome but i would like to get some more power out of it. and also i would like to find a speedometer for it that comes with the sender.

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2007 Sportsman 500 Deluxe
27 inch Mud Machines (Tires)
12 inch SS Black (Rims)