find a dollar general and get some awsome. yellow cleaner is AMAZING!
i used to use simple green but this awsome stuff is the stuff. spray kart down, set for 10 min and hose off. breaks down most of the nasty stuff. i follow up with cheap brake clean and another awsome bath after to nuetralize.
then blow off with compresed air and coat with wd40….i head the pledge works well too but the wd40 keeps everything lubed up and makes it easier to clean the next time.
been doing this process on everything from quads to karts for 30 years