EVO All Evo Model Discussion

Severe Vibration At 1800 RPMs

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  #51  
Old 05-01-2011 | 06:00 PM
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Rider1000
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Spanners39, the only thing I can think is that I had new tires installed at the dealership before the belt tightened up on me. I think it was a separate issue from the vibration problem. But you're right, the rear wheel went out of alignment and the belt tightened. Thanks.
 
  #52  
Old 05-01-2011 | 07:45 PM
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Originally Posted by Rider1000
Fellas, I can finally put this thread to rest. I installed a new front motor mount and the bike is riding much much smoother. Comparing the old and new mounts, the front bolt holes, that go into the rubber, are located about 1/4" lower. With the old motor mount the rubber was grounded against the bracket causing the vibration to be felt throughout the entire frame. The new bolt hole location allows the engine to float within the mount now.

I hate to say this but it seems that Harley redesigned the front motor mount (knowing there was a problem) but they didn't offer a recall or try to inform the customers, so customers like myself had to absorb the cost of a new motor mount, it seems to me anyway.

Anyway, I'm happy I'm riding again, and thanks to everyone for the help!
I have a 97 EG that has a vib exactly as you have described. I did run a compression test and the plugs look good. It had a frt motor mount replaced shortly before I bought it. This thread maybe alot help to me so thank you for your efforts. Respects WP
 
  #53  
Old 05-01-2011 | 10:51 PM
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WP, my pleasure, and thanks for the nice words.

If you look at your motor mount from the front while it's still installed on your bike, just above the top front Allen bolt, where the top of the rubber rectangle is, there should be a gap between the threaded rubber rectangle and the frame. On my new mount, the rectangular rubber part with the threaded holes is located about a 1/4" lower allowing clearance between the rubber and the frame. The old mount was grounded against the frame. Hard to explain but I hope it helps.

I believe the old mount worked ok for the first 10,000+ miles because there was some clearance, but I hit some deep pot holes last summer which I believe caused the threaded rubber rectangle to shift up and jam against the frame. With the new mount, even if it shifts up they'll still be enough clearance because of Harley's redesign.
 
  #54  
Old 05-02-2011 | 08:48 AM
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Hopefully I can geta couple of irons outta the fire in the next few days. That should allow me time to really look at this. I fixed a broken fairing mount, least I can see the gauges at 1500 -1800 rpm now BG I gotta get the time to get out and ride it some. Thanks again and Be Safe WP

I admit I haven`t lookes but by chance could this mount be installed upside down or backwards in any way?
 

Last edited by WP50; 05-02-2011 at 08:50 AM. Reason: ? popped into my head Thinking hurts me sometimes
  #55  
Old 05-02-2011 | 04:21 PM
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Thanks, you be safe too.

I think the mount can only go in one way, all four bolt holes need to line up.
 
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