just bought a 98 bayou 300 4x4 and having some carb issues. when i go to give gas and accelerate i have to turn my choke on as i ride and when i bring it back down towards a idle i turn the choke off. any body have an idea whats going on with this? also i need new tires and i was wondering if i could fit 25x8x11 on the front and 25x10x11 in the back with out issues. thanks!