21 RTL Handlebar shake at 45 mph. Running out of ideas. Any suggestions?
21 RTL with 3,200 miles. Around the time of the 3,000 mile checkup (coincident with installation of BajaRon sway bar) I developed a shake in the handle bars. Worse at 45 mph, gets a smoother as speed increases to nearly gone at 60. The dealer is trying to help, but they are a small shop with limited Spyder experience.
Things we've tried so far: 1) Spin balance front wheels. 2) Swapped wheels with a brand new demonstrator at the dealer. 3) Removed sway bar end links to rule out sway bar. None of these had any affect on the shake.
I have asked the dealer to laser align the bike to see if that helps, but I'm also looking for other possible causes. Research on the forum suggests a few possibilities including: 1) bad battery or loose connections affecting the DPS. 2) bad shock absorber. 3) Something (computer) associated with the DPS - supposedly the electric assist goes away above 45 mph? 4) Loose suspension components (ball joints)?
Obviously we're clutching at straws and would welcome any experience or suggestions that could cause this.
Update on my handlebar shake issue.
Update on my tire balance issue. I took them to a shop in Ft. Myers, FL for a "road force" balance. They found the balance was fine on the tires, BUT the left tire had radial and lateral runout. The right tire had only radial runout. Also found some confusing codes for build dates on the tires. Both tires have two sets of numbers, one is 4720 that seems about right for a bike purchased in March 21. The second number is 0210, just to the right of the 4720. Tire gurus any opinion?
NOW, where to find decent replacement tires? Tire Rack is out of Vredesteins until January (maybe). Continentals are back ordered until the end of November (if you believe them). This was for 165/60-15 tires since they don't have any tires in 165/55-15 size. Has anybody found tires other than Kendas somewhere?