rubber mounts
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
its a process and you can't just assume its done right, you have to look closely underneath, see how pancaked they are and if they are sticking out or cracked, check the torque on them before you loosen them. pull them apart, check the condition of the cupped washers, are they bent at all? Get a washer that is 1/2" ID and " OD to match the inner ring of the cupped washer for the bottom only. You only need one for the top if the bottom of your risers isn't flush against the cup, if part sticks out further like on most t-bars you need to take up that space too with a small washer ON TOP of the cupped washer, not below it as well. Then torque it up to 35 ft lbs with blue Loctite and the bushings will not collapse and they should be very tight and it will be very smooth. Key is finding the right size washer that fits in there just right. Most people just snug them until tight, I even asked a couple shops and they said there's no torque spec just tighten them up, that's not correct and there's a bulletin for 35 ft lbs. You can do this is about 15 minutes once you have the washers. Night and day. I replaced all three mounts, aligned it multiple times, changed bearings etc...it was more stable as my mounts were shot, but NOTHING got rid of the mind numbing vibration including poly bushings, this was it.
Cruiser
Joined: Dec 2013
Posts: 154
Likes: 75
From: Sweden
changed front rubber mount yesterday and maybe it got a little better, going to change the rear one off course but it is on backorder at the moment. Was hoping for a long ride to day but it´s pouring down way to much to enjoy it here in Sweden 
Cruiser
Joined: Dec 2013
Posts: 154
Likes: 75
From: Sweden
got a chanse to take a ride on a friends 1996 road king yesterday, now that´s how a rubber mount should feel. Would like to hear if someone else have compered those two models ? i know it´s a big differece in the way the rubber mount´s are designed. Allmost tempted to trade bikes whit him now, he only bought the road king to use as a donor bike 
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
I owned an FXDXT for several years and have ridden it back to back against my Evo. The twincam Dyna doesn't enjoy the same smoothness as the three-rubber mount IMHO. I installed True-Track kits on both bikes, which improved their ride and handling greatly.
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