Does it make any sense to lub the ball joints on the 700 FI grizzly by slipping in a grease needle behind the rubber seal and giving it a couple strokes?

Best regards

 

It's probably not necessary, these ball joints seem to last forever without any maintenance. Usually when a ball joint goes it's due to age, and the rubber boot cracks and lets contaminants in. I wouldn't mess with it, sometimes when you get one of those boots out of the groove it's a heck of a battle trying to get one back in.