2008 drz 400 12,000 km Replacing a rear tire and checked the wheel bearings. They are really tight. I always add a bit of grease to the inside of the seal when I have the wheel off to provide some extra protection for the bearings. Both sides are very tight. I removed the seals and removed the bearing seal. Both bearings still have what appears to be clean grease in them. I packed some belray water proof grease in them and put it back together. Just shocked by how tight they are. I can rotate them and they feel smooth but they are hard to rotate. No sign of excessive heat going on. Any one experienced this? Do I need to be worried? Heading out for a week with the bike and live in a remote location so getting bearings is a long process.