Help getting Rad. cap off of 750 Brute

Hello peeps, I'm new to mudding and modding and I just got a 750 Brute Force that is fully rigged out. The problem right now is that when I ride it is smells kinda like mud though it is clean. The reservoir looks very low.

My problem is that I'm not sure how to get to the radiator cap without removing plastics (which will be hard because of the enormous snorkel sitting above it). So what should I do first? Should I fil reservoir and if so, what is the mix of water/coolant? Thanks in advance guys and gals!

Juts fill up the resorvor first.If you are smelling mud there could be some stuck under you heat shield burning off or also stcuk in your rad.The rads on these bikes arent the easiest to clean at all.The best way I found the clean the rad is spray it with some purple power and let it soak for a few minutes then spray it out good.

Purple Power? Never heard of that stuff. May have to look into that because mud is definately hard to clean out of radiators.

Thats what we use!!