This advise was provided to me by Mr. Josh Huff after an off track episode at Adams Kart Track. My kart looked like freaking powdered doughnut and the motor mount/lower case/bearing support was ten times worse. (sand/oil/chain lube…yuck) This was a practice session the night before a race and I didn’t have time to break everything down to clean properly. I took a disposable 9×12 aluminum pan and secured it under the motor with a bungie cord. Removed rear wheels and chain, put roughly 1/4 inch of fuel in the pan and used a 3 inch paint brush to “paint” the lower case, rails and mount with the fuel. I stayed clear of the electrical connections (rotax evo) and axle bearings. The oil/sand mess literally melts off the kart. I removed the pan and hit it with a little compressed air. I then sprayed the same area with a liberal dose of WD and again hit it with compressed air and wiped up any residual. For the rest of the chassis I used a second paint brush (dry) to brush every nook and cranny. Pedals, tie rod ends and every weld and nut and bolt on the chassis had dirt in it. Within 30-40 minutes the kart was clean and track ready.