rubber engine mounts
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
A bit more frequently than you'd think 
The front is prone to failure due to poor vehicle/engine alignment and oil contamination when removing the oil filter; the oil degrades the rubber of the isolator. The rear seems to hold up better; but the front is a problem child.
I lost my first front at 600 miles on the ODO due to alignment; WGlide was at 1k when his needed replacement. The front is a known wear item.
Do yourself a real favor, change out the OEM front mount for a Predator mount; that mount belongs on every Dyna It's properly engineered and designed to not be affected by oil contamination. Order from the U.K. site; it's cheaper due to the exchange rate and you'll receive it faster via FedEx international priority. You will notice the difference in straight line stability and the neutral/no pushing in the corners with the Predator.
Changing out the front mount isn't a hard job to do, and the difference between the Predator and the OEM is night and day...
http://www.predatorvcs.com/harley_da...t_engine_mount
The front is prone to failure due to poor vehicle/engine alignment and oil contamination when removing the oil filter; the oil degrades the rubber of the isolator. The rear seems to hold up better; but the front is a problem child.I lost my first front at 600 miles on the ODO due to alignment; WGlide was at 1k when his needed replacement. The front is a known wear item.
Do yourself a real favor, change out the OEM front mount for a Predator mount; that mount belongs on every Dyna
It's properly engineered and designed to not be affected by oil contamination. Order from the U.K. site; it's cheaper due to the exchange rate and you'll receive it faster via FedEx international priority. You will notice the difference in straight line stability and the neutral/no pushing in the corners with the Predator.Changing out the front mount isn't a hard job to do, and the difference between the Predator and the OEM is night and day...
http://www.predatorvcs.com/harley_da...t_engine_mount
Tourer
Joined: Apr 2009
Posts: 336
Likes: 9
From: Elk Grove, California
A bit more frequently than you'd think The front is prone to failure due to poor vehicle/engine alignment and oil contamination when removing the oil filter; the oil degrades the rubber of the isolator. The rear seems to hold up better; but the front is a problem child.
I lost my first front at 600 miles on the ODO due to alignment; WGlide was at 1k when his needed replacement. The front is a known wear item.
Do yourself a real favor, change out the OEM front mount for a Predator mount; that mount belongs on every Dyna It's properly engineered and designed to not be affected by oil contamination. Order from the U.K. site; it's cheaper due to the exchange rate and you'll receive it faster via FedEx international priority. You will notice the difference in straight line stability and the neutral/no pushing in the corners with the Predator.
Changing out the front mount isn't a hard job to do, and the difference between the Predator and the OEM is night and day...
http://www.predatorvcs.com/harley_da...t_engine_mount
The front is prone to failure due to poor vehicle/engine alignment and oil contamination when removing the oil filter; the oil degrades the rubber of the isolator. The rear seems to hold up better; but the front is a problem child.I lost my first front at 600 miles on the ODO due to alignment; WGlide was at 1k when his needed replacement. The front is a known wear item.
Do yourself a real favor, change out the OEM front mount for a Predator mount; that mount belongs on every Dyna
It's properly engineered and designed to not be affected by oil contamination. Order from the U.K. site; it's cheaper due to the exchange rate and you'll receive it faster via FedEx international priority. You will notice the difference in straight line stability and the neutral/no pushing in the corners with the Predator.Changing out the front mount isn't a hard job to do, and the difference between the Predator and the OEM is night and day...
http://www.predatorvcs.com/harley_da...t_engine_mount
Hey Tin, how can I tell if my motor mount is bad? I haven't noticed any handling problems (8,000 miles so far on my 16 LRS).
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,899
Likes: 8,006
From: poway
I got over 40K out of the original mounts but when the vibes got worse new front helped. Bike is a 116 (4 inch bore x 4 5/8 stroke) Tried a Predator, vibes got worse.. Went back to stock.. Changing the back and shimming the front got it to where it was the best.
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
Begin with a visual inspection of the mount; check to see if the rubber is contacting the engine bracket. If the rubber is contacting the engine bracket excessive vibrations and decel shuddering can be expected. If your mount is saturated with old engine oil that is another way they degrade.
HD did have a service bulletin on the front mount, it will show you how to check your front out. If you did find the rubber is contacting the engine bracket I'd just change out the mount; HD's solution is a band-aid
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Got about 30k on the first one, and another 30k on the second. Realistically it should have been replaced both times at about 20k... because the first time, it put such stress on my V&H BR2-1, that when the engine 'fell' it broke all but one of the mounts for my front header heat shield. The second time, the engine was close to hitting the frame...
Pictures of the pos stock isolator, and the answer: Predator.
Pictures of the pos stock isolator, and the answer: Predator.
Trending Topics
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,899
Likes: 8,006
From: poway
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Grand HDF Member
Joined: Mar 2010
Posts: 3,949
Likes: 150
From: South of Mordor
30k, I am about 10% of the way there, but I just put mine on back in February and I was deployed for two of the past 5 months. The riding I have done since this change is night and day handling wise. I changed my original mount out for this at 55k miles, I didn't feel my mount had failed because I couldn't visually tell it had dropped the engine forward, however when I made the change I could tell because I had to lift the motor about a quarter inch or so to get the frame mounting holes to line up.
Thread
Thread Starter
Forum
Replies
Last Post