Question about 2008 Harley Davidson FLHX Street Glide
It could be wheel/tire balancing issue if you only feel the vibration at highway speeds (60 mph and above) then higher speeds it goes away.
I've worked with tires and rims on trucks, bikes and cars and have found that a harmonic vibration is usually caused by tires being out of balance.
Perhaps the dealer could check for a vibration on a dyno.
For the DIY bikers.....Use CAUTION but, the Old school routine would be to raise the wheels (heavy duty Bike Jack) strap it down and spin the tires by hand and check the rims for run out (to the sides) and the tires to see if they are round and true.
Then spin the rear tires to speed (3500rpm) to see if the shaking/vibration is there. Also rotate/spin the front tire and see if there is a heavy spot that will settle to the bottom. Add a the appropriate weight (1/4 oz stick on weight) to the opposite side (180 degrees) of the heavy spot. Spin again and see if totally random spots settle to the bottom. Road test and see if it improves.
Posted on Oct 05, 2009
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Posted on Jan 02, 2017
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