I have a 2004 Foreman 450ES. I have started riding in the mud alot more now. Now I have also realized that I have very little brakes on the back end. I used to be able to set my emergency brake and it would hold my bike on elevated ramps, but not now. I have never changed them Do I need to adjust them, and if so, what is the best way? Or do I need to replace them? I see some people talk about a brake conversion kit. What is this? Thanks!!!