How often do you grease the rear grease fittings? Today I was changing the oil in the Grizzly(85 hours) and I figured I'de hit the grease fittings with a shot or two of fresh grease. I was bothered when I seen some water and crappy grease come out the side of the bushing. When I had Yamaha do it's 50 hour service, they said they greased all 4 fittings. In my observation, it didn't look like they had been touched in quite a while with grease. Anyway, I gave all 4 of them a healthy shot of fresh grease and from now on I think I will be doing this more often. Does anyone in here know how often to do this? Thanks..