Can anyone please give some advise on a shake that has developed with my 900. The shake started a year ago as a slight wiggle while decelerating when reaching 35 mph with one hand resting on the throttle. Took it to the dealer who said cupped tire and changed it still had the shake. Next he rebalanced the tire checked spokes tension and made sure the rim was true. I still have the problem which is turning into a wobble and you can feel it while riding. Any ideas folks?