Front Motor Mount Performance
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Stage I
Joined: Aug 2007
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Front Motor Mount Performance
My 06 Road King developedvibration problemsafter HD Service replaced "cracked" front rubber (motor) mount. Can anyone explain how the mount works when the service manual states "There should be a gap between the mounting plate and the cushion portion (underside) of the rubber mount"?Before HD Service replaced the rubber mount, the old one was slightly compressed by the mounting plate but (for 20,000 miles) had noextraordinary vibration (the "crack" was noticed during 20K mile checkup - NOT from a complain). I am now rattling baffles loose and experiencing noticable increase in gross vibration at idle and high frequency vibration at cruising speeds.
Outstanding HDF Member
Joined: Jul 2007
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From: Indy area
RE: Front Motor Mount Performance
ORIGINAL: rowankhan
the service manual states "There should be a gap between the mounting plate and the cushion portion (underside) of the rubber mount"
the service manual states "There should be a gap between the mounting plate and the cushion portion (underside) of the rubber mount"
Theoretically, the mount bolt hole in the engine's mount bracket should be centered over the "mounting plate" hole with the rubber mount centered between them. If your vehicle alignment doesn't allow for that it's best to split the difference. Keep the rubber mount centered in the "mounting plate" as best you can first. Only shift it if you can't keep the through-bolt from binding anywhere as you drop it into place. It should tighten without any misalignment through the mount. The torque value on all three of those bolts is 15-20 ft-lb.
Cruiser
Joined: Jun 2006
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RE: Front Motor Mount Performance
Same with mine, replaced front mount under warrenty, noticed when I cranked up in the parking lot of the dealer that idle vibration is increased. I was told, it's a new design.
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