The wheel bearings on my KDX are the "sealed" type, you guys know what I'm talking about. They still rotate fine, I just want to give them a bit of grease. What's the best way to do this? I've tried just squirting grease around the rotating section as I spin it, and try to work it in there. It worked, but is there a better way? Are these bearings meant to be serviced? The manual basically just says replace if they're sticky, but I'm super anal about maintanence on my bike, I keep everything lubed up almost after every ride.