Just what I need, another filter to check and clean. 7602 Racing says that your four-stroke is eating dirt via the carburetor vent lines, and I don’t want my bikes on that kind of diet, so I was willing to try the installation. The tiny billet-aluminum hose manifold is a real piece of work. The detail is amazing for such a small part. Naturally, it comes in different colors. To go along with the vent line filter manifold, 7602 has opaque-colored vent line tubing. I went ahead and mixed the colors just for fun. The kit’s directions are easy to follow, but the colored line is a bit smaller and less stretchy than the stock hoses. I did the install on a cold evening and had to use a heat gun to expand the hoses enough to get them on the carburetor. It wasn’t too tough, and the hoses have been trouble-free since. The vent line filter is supposed to be located right under the carburetor intake bell and has to be accessed to take apart and check/clean/replace the tiny filter element. The somewhat fussy installation and the filter changing are the only hits the product took in our rating system. As far as performance goes, it rates high. You only need to check the element every 10 hours. We tested in the winter when dust was minimal, so it went a bit longer, but the filter did indeed catch some dirt that would’ve entered the carburetor otherwise. If you want to block every last bit of dust from entering your bike’s engine, it will run you $38. Ten feet of colored vent hose is an additional $14. The install is much easier while putting on new hoses. -Karel Kramer