i disagree totaly, a 2 wheel drive quad looks much better clean and flying through the air on a dry track
and the mud gets in the bearings and wears on the machine alot, and when your on a 350lb machine and got 50 to 100lbs of mud on it can slow you down quite a bit
ya ive raced in the mud im not scared and im not gona give up points for mud but it is my most unfavorite way to ride
PS a tip for racing in mud - 1. cut your fenders so they dont collect mud or 2. put RainX or vasoline underneith the fenders to prevent the mud from sticking to the fenders 3. or do both it wont hurt