A little background....the needle bearings and seals are Kawasaki exclusive. The needle bearings tend to cut into the soft shaft of the bolts and then start to bind. If you replace the bearings and the shaft is rough you haven't solved the problem.
The solution as pointed out to me by T Cro is to replace the needle brearings with solid bushings. He suggested this company...
www.lm-tarbell.comand I also found ....
http://ametric.com/ametric has a web based store that you can directly order from. They are less expensive than lm-tarbell
You will need 3 of 20mmx27mmx16mm and 2 of 20mmx27mmx32mm ID/OD/Length
At the end of the day Canadian shipping and brokerage ran these from a $20 purchase from Ametric to $90 so I had a retired fellow I know that has a machine shop in his garage turn these for me.
Looks to be a winner in the fit and function departments.