Definitely get the steering head bearings checked out. Make sure they are properly lubed, and have the fall away checked. There were numerous reports of improperly adjusted and/or loose bearings on the '09 models. There also was a specification change for the stem nut torque if I remember correctly. And yes, if the bearings have been excessively loose for 6000 miles they might be shot (bearings and/or races tend to get beaten to death when loose).
"cant be tire pressure,cupped tire or balancing. 2nd tire , same problem." What tire pressure are you running? And how does a new tire eliminate tire pressure as a possible cause? Also, since when does having a dealer install a new tire mean your wheel and tire are now automatically true and properly balanced? Do you have any idea how many bikes go back to their owner's after a tire change with the exact same wheel weights as when the bike left the factory? Don't believe me, mark each weight and take a photo before your next tire change, then take a look after. And I seem to remember a problem with more than a few wheels on SERK's with improper machining resulting in excessive runout; could happen on any wheels. My point is, these things all need to be considered and checked as part of a proper diagnostic procedure. Something is setting off the vibration. And if the head bearing preload isn't correct, the front end geometry won't effectively dampen the side to side motion. Fix the head bearing issue and you may see a big improvement, but that doesn't necessarily mean that was the root cause. Just like in medicine, you can just treat the symptoms, but it's best to find the root cause and eliminate it.
Jerry
Author
Topic: Front End wobble at 45-50 mph (Read 16915 times)