A couple things to look for in a good fender is material and fitment. Fenders need to be made from a good quality material so they can be painted without a major amount of prep. Most fenders are made from steel. The other thing to consider is if the fender you chose needs heavy modifications to be mounted to your motorcycle. If you have to cut, grind and drill in order to just get the fender mounted, you might want to look for something different. However, for most custom builds this is necessary, and various fender mounts and brackets are available that help make the job much easier. The last thing to consider is if it covers your tire as it should. If you are running a 5.00-16" motorcycle tire (which is about 5" wide) then you need to run a fender at least as wide... a 4-3/4" fender is not the right choice for this tire.