Motor mounts!?!?
Elite HDF Member
Joined: Jan 2006
Posts: 4,344
Likes: 67
From: Hooterville, Fl.
Hey Brett,
Don't think you would mind if I jump into your thread here because of me talking about the isolators. I read in the evo section every day, but very seldom post and now twice in one day, because I just started another thread here.
About 6000 miles ago on my 1998 FXDWG with 45,000 miles on it, I started noticing more vibration at idle. I read many of the other threads about the isolators and have been suspecting they are going bad. Well a few months ago, I bought an angle finder and checked the front wheel rotor compared to the rear rotor to make sure they were even and perpendicular to the bottom of the frame. Well I found that the rear was off by almost 3 degrees. I first loosened the mounts and following the directions in the service manual, I idled the engine for a few seconds to "set" the engine into the frame. I checked the shocks and horizontal alignment in relation to the front wheel. Horizontal alignment was fine, but the vertical was still off by 3 degrees. I was thinking then "How could the vertical alignment suddenly be off that much when the bike has not been in an accident". I removed the gas tank, loosened the front and rear isolator and adjusted the top stabilizer link until the rear wheel was perfectly at 90 degrees just like the front wheel. Well it did help a little on the vibration for a while, but now it is back along with another problem. The bike when the saddle bags are on and loaded with more weight wants to "wobble" in the rear at speeds over 70 when I am around truck traffic or on windy days. It does not do this all the time, just occasionally, but sure causes a butt pucker when it happens. The more I read about the isolators, the more I think they have deteriorated to the point that they have lost some of their rigidity.
Comments and suggestions are welcomed.
Don't think you would mind if I jump into your thread here because of me talking about the isolators. I read in the evo section every day, but very seldom post and now twice in one day, because I just started another thread here.
About 6000 miles ago on my 1998 FXDWG with 45,000 miles on it, I started noticing more vibration at idle. I read many of the other threads about the isolators and have been suspecting they are going bad. Well a few months ago, I bought an angle finder and checked the front wheel rotor compared to the rear rotor to make sure they were even and perpendicular to the bottom of the frame. Well I found that the rear was off by almost 3 degrees. I first loosened the mounts and following the directions in the service manual, I idled the engine for a few seconds to "set" the engine into the frame. I checked the shocks and horizontal alignment in relation to the front wheel. Horizontal alignment was fine, but the vertical was still off by 3 degrees. I was thinking then "How could the vertical alignment suddenly be off that much when the bike has not been in an accident". I removed the gas tank, loosened the front and rear isolator and adjusted the top stabilizer link until the rear wheel was perfectly at 90 degrees just like the front wheel. Well it did help a little on the vibration for a while, but now it is back along with another problem. The bike when the saddle bags are on and loaded with more weight wants to "wobble" in the rear at speeds over 70 when I am around truck traffic or on windy days. It does not do this all the time, just occasionally, but sure causes a butt pucker when it happens. The more I read about the isolators, the more I think they have deteriorated to the point that they have lost some of their rigidity.
Comments and suggestions are welcomed.
Last edited by MJ; Jul 18, 2009 at 08:55 PM.
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Road Captain
Joined: Aug 2008
Posts: 550
Likes: 8
From: Twin Cities,Mn.
Hey Brett,
Don't think you would mind if I jump into your thread here because of me talking about the isolators. I read in the evo section every day, but very seldom post and now twice in one day, because I just started another thread here.
About 6000 miles ago on my 1998 FXDWG with 45,000 miles on it, I started noticing more vibration at idle. I read many of the other threads about the isolators and have been suspecting they are going bad. Well a few months ago, I bought an angle finder and checked the front wheel rotor compared to the rear rotor to make sure they were even and perpendicular to the bottom of the frame. Well I found that the rear was off by almost 3 degrees. I first loosened the mounts and following the directions in the service manual, I idled the engine for a few seconds to "set" the engine into the frame. I checked the shocks and horizontal alignment in relation to the front wheel. Horizontal alignment was fine, but the vertical was still off by 3 degrees. I was thinking then "How could the vertical alignment suddenly be off that much when the bike has not been in an accident". I removed the gas tank, loosened the front and rear isolator and adjusted the top stabilizer link until the rear wheel was perfectly at 90 degrees just like the front wheel. Well it did help a little on the vibration for a while, but now it is back along with another problem. The bike when the saddle bags are on and loaded with more weight wants to "wobble" in the rear at speeds over 70 when I am around truck traffic or on windy days. It does not do this all the time, just occasionally, but sure causes a butt pucker when it happens. The more I read about the isolators, the more I think they have deteriorated to the point that they have lost some of their rigidity.
Comments and suggestions are welcomed.
Don't think you would mind if I jump into your thread here because of me talking about the isolators. I read in the evo section every day, but very seldom post and now twice in one day, because I just started another thread here.
About 6000 miles ago on my 1998 FXDWG with 45,000 miles on it, I started noticing more vibration at idle. I read many of the other threads about the isolators and have been suspecting they are going bad. Well a few months ago, I bought an angle finder and checked the front wheel rotor compared to the rear rotor to make sure they were even and perpendicular to the bottom of the frame. Well I found that the rear was off by almost 3 degrees. I first loosened the mounts and following the directions in the service manual, I idled the engine for a few seconds to "set" the engine into the frame. I checked the shocks and horizontal alignment in relation to the front wheel. Horizontal alignment was fine, but the vertical was still off by 3 degrees. I was thinking then "How could the vertical alignment suddenly be off that much when the bike has not been in an accident". I removed the gas tank, loosened the front and rear isolator and adjusted the top stabilizer link until the rear wheel was perfectly at 90 degrees just like the front wheel. Well it did help a little on the vibration for a while, but now it is back along with another problem. The bike when the saddle bags are on and loaded with more weight wants to "wobble" in the rear at speeds over 70 when I am around truck traffic or on windy days. It does not do this all the time, just occasionally, but sure causes a butt pucker when it happens. The more I read about the isolators, the more I think they have deteriorated to the point that they have lost some of their rigidity.
Comments and suggestions are welcomed.
I'm fine with you jumping in-the more the better as far as I am concerned. I might just learn more about my bike....I can never learn too much!
Road Warrior
Joined: Apr 2007
Posts: 1,354
Likes: 1
From: S.W. Florida
I'm not a Dyna guy, but a rubber mount is a rubber mount. My real 93 FXR is a bit different in the way the front mount is designed. Our EVO'S are older bikes and the rubber does not last forever. During my rebuild, I replaced the rear swingarm Cleveblock system with the CCE Spherical Bearing kit, installed a new HD front mount, V-Thunder stabilizers and replaced all of the rubber parts on the bike.
Let's be realistic these parts were over 15 years old. I also discovered that the previous owner had the drive belt replaced by an Indy. The guy cheated by removing just enough of the left side of the swingarm to slide the new belt into place. Upon reassembly, the inner nylon washer was not aligned properly and was chewed up. The pulley spacer was corroded and never replaced causing a transmission leak shortly afterwards.
The CCE rear swingarm kit took all of the sway out of the rear end and the bike tracks like it's on rails. This kit still utilizes the outside rubbers, so there is still rubber mounted dampening to a certain extent. Not saying that you need to go there, but something worth thinking about. I'd sure think about replacing those other mounts and rubber parts though. Not a fun job, but nice to know that the parts are new and will last for awhile.
Let's be realistic these parts were over 15 years old. I also discovered that the previous owner had the drive belt replaced by an Indy. The guy cheated by removing just enough of the left side of the swingarm to slide the new belt into place. Upon reassembly, the inner nylon washer was not aligned properly and was chewed up. The pulley spacer was corroded and never replaced causing a transmission leak shortly afterwards.
The CCE rear swingarm kit took all of the sway out of the rear end and the bike tracks like it's on rails. This kit still utilizes the outside rubbers, so there is still rubber mounted dampening to a certain extent. Not saying that you need to go there, but something worth thinking about. I'd sure think about replacing those other mounts and rubber parts though. Not a fun job, but nice to know that the parts are new and will last for awhile.
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