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Discussion Starter #1 (Edited)
I just did my first major service on my 07 DL650 at 18,000 miles and I think it vibrates a little more at highway speed now than it did before the service. I did everyting except a throttle body synch since I do not have the special tool required and they seemed just fine before the service. Here is what I did:

Valve check (all in spec)
New Plugs (NGK CR8E gapped to .030)
New air filter
New brake fluid
New coolant
Oil and filter change
Checked the chain for tight links (none), lubed and adjusted it properly.

The bike runs strong and gets 50+ mpg on the highway at an indicated 75-80, starts instantly & idles smoothly. Yesterday I took it on a 300 mile trip and it "seemed" to vibrate a little more than before the major service at highway speed. Maybe this is just in my mind but I don't think so. What could be causing this?

Vic
 

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Discussion Starter #3 (Edited)
Chain adjustment would be the 1 change you made, that could make some difference
Thanks for your reply. I have been riding a long time and am sure the chain is not the issue. That was my first thought as well. I checked it when I first felt the vibration and it is right. During the service, I loosened it all the way, cleaned it with kerosene, checked every link to be sure there were no tight links in it, lubed it well and adjusted it.

Quite honestly, I am baffled! LOL I guess that is why I posted the note to this site.

Vic
 

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That is baffling. Mine had more vibration after service, but I chalked that up to a pretty radical valve adjustment. Your situation defies easy explanation.
 

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Discussion Starter #5
I took the bike out again yesterday to see if I could narrow down what might be behind the vibration. I ran it up to an indicated 80 and could feel the vibs in the bars (not bad but they were definately there). Ran it on up to 90 and then pulled in the clutch & dumped the throttle and it was silky smooth. Definately not chain or a tire slightly out of balance. I got on a side road and ran it up to 5500-6000 rpms in the first 3 gears and could feel the vibs as well in that rpm range. Do all DL650s have a harmonic vib in that rpm range?

The only other variable that has changed and that I have not considered thus far is that I changed the stock bars for MSR Lows awhile back. Maybe they vibrate more and I have not noticed it because, until this past weekend, I have not had it on an interstate for any extended period since the change. I have ridden it a lot since the change but mostly on backroads where you are not droaning along. Might it just be the bars and not the service at all?

I am still baffled. While it is not bad enough to be a problem, it did seem to change and that always makes me wonder what's behind the change.

Ideas??

Vic
 

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Put the old bars back on and check it out:yesnod: I installed 2" riser and can now feel the vibration (that was always there) If I take the riser off, no vibe. We often take for granted the engineering that goes into making these bikes what they are. Making changes can make changes.:headbang: You have made other changes that can increase or decrease engine vibes. New plugs (no guarantee they are firing as the old ones did) New oil (did you go to a higher viscosity or different brand?)
 

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Did you put the bar end weights into the new bars?
 

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A few years ago I went in a Cessna 182 from Toronto, Canada to Long Island in the Bahamas. Beacuse of weather and the need to go around it, we spend two days getting to Fort lauderdale Executive airport. So I had become quite familiar with teh sounds and vibrations of that 40+ year old airplane.

I found it interesting that when we headed out over the ocean and got far enough from land that we could no longer glide back to shore I noticed all kinds of noises and vibrations that I had not heard previously.

I noticed on my Strom that when I got to thinking about the possible need to check and adjust my valves I noticed more vibration coming from it.

I suspect that in many cases it is simply awareness that makes us hear or feel things differently. There might actually be something going on, but if it is subtle enough that you have to think hard as to whether it was there previously odds are there isn't an issue.

..Tom
 

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Here is what I did:

Valve check (all in spec)
New Plugs (NGK CR8E gapped to .030)
New air filter
New brake fluid
New coolant
Oil and filter change
Checked the chain for tight links (none), lubed and adjusted it properly.

Vic
This'll teach you! Never do more than one thing at once.

(Yeah I know, if only you could easily do it that way).
 
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