Can a bad front shock on a harley road king cause a vibration

You can get lowering rear shocks and front fork lowering kit from H-D parts.

shrader valve should be on left close by top of shock.open up bag cause lid in way...good luck..

Hi Patti, Road Kings have air shocks at the rear. You will need a FL touring hand pump and adjust the air pressure accordingly to your weight/load.

25 psi would be the maximum on the stock shocks for your road king. I usually myself run about 17 psi in the rear shocks with a passenger.

Shaking and vibration is normal for most Harleys, it's caused by the angle of the twins, it's normal for mostly all Harley motorcycles.

The Road King shocks are air adjustable via an air valve located on the right side of the bike just above the rear tire. Your Harley Davidson owner's manual will tell you what the shocks should be pressurized to depending upon the load on your bike (for instance - if you'll be carrying a passenger - the pressure should be a bit higher than it would be if you were riding solo). Don't even attempt to read the pressure unless you have the specialized hand pump that is used to pressurize the shocks. You can purchase this from Harley Davidson or via a third party online. The valve is a typical bicycle / auto air valve - but ... DO NOT attempt to pressurize it with anything but the specialized hand pump. Using anything else will risk over pressurization of your shocks and that's not good. The shocks hold a very small volume of air at relatively low pressure levels - so the hand pump is a must have.