I have a 2004 YFZ 450 that has hime joints on the A-arms that mount to the frame. Does anyone know of any other alternatives other than hime joints because they wear out very easily and they are very squeaky.

 

Get some greasable heim joints.. or some better ones... simply do a search for "Heim Joints" trust me.. there are 30,000 variations out there.. haha..

I would have to think someone has came up with an Aftermarket Kit for the YZF-450.