Engine vibration at 4500 rpm - BMW Luxury Touring Community
 
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post #1 of 12 Old Oct 21st, 2007, 8:11 am Thread Starter
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Engine vibration at 4500 rpm

I've noticed I have a vibration between 4500 & 5000 in every gear. It must be engine, right? Not serious, and sometimes I go through it so fast I don't notice it. However, with each gear, if I accelerate slowly, I feel a vibration at 4,500 that goes away at 5,000. Smooth after that.
Could this be a output shaft bearing? I'm thinking engine instead of transmission or drive train..
Any suggestions??
I have a 04 w/ 31,000 mi if that helps..
Thanks,
Jeff

08 R1200GSA
04 K12LT (Sold)
97 R1100GS (Sold)
SS1000--IB # 32778
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post #2 of 12 Old Oct 21st, 2007, 8:34 am
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The vibration you describe is a feature of the LT. Those that have installed a Remus exhaust report that the vibration has gone away. BMW installed an exhaust hanger after initial reports of the vibration so you might check to see if yours is tight.

The vibration seems to be over a very narrow RPM range so most riders tend to avoid this engine speed. HTH

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Last edited by astuber; Oct 21st, 2007 at 12:45 pm.
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post #3 of 12 Old Oct 21st, 2007, 8:34 am
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Mine does it also. I think it is just the non-sweet spot of the engine.
Rev higher or lower.
7,000 RPM is very sweet.

Mike in Pittsburgh

2000 K1200LT Canyon Red
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post #4 of 12 Old Oct 21st, 2007, 8:44 am Thread Starter
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Thanks!!! I was thinking some bearing was going out and the clutch was going to get soaked in oil.. Thousands of $$$$$ in expenses...
I'll just continue to go through it as fast as I can..

08 R1200GSA
04 K12LT (Sold)
97 R1100GS (Sold)
SS1000--IB # 32778
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post #5 of 12 Old Oct 21st, 2007, 2:16 pm
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4500 RPM's means you're gettin' there!

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post #6 of 12 Old Oct 21st, 2007, 7:51 pm
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Lightbulb Note to Self

Ride my LT just slightly below 4500 RPMs or well above 5000 RPMs

The move above 5000 it's like hopping off a Harley and onto a sport-bike as you ride !! Although you can wear a rear tire quickly that way -- trading rubber and gasoline for that much fun is a deal of a lifetime.
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post #7 of 12 Old Oct 21st, 2007, 7:54 pm
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Most of us learned early that that little vibration is the built in signal to hold on, the fun is about to begin!

I don't want to achieve immortality through my work...I want to achieve it through not dying.

David Shealey
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post #8 of 12 Old Oct 21st, 2007, 9:21 pm
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Quote:
Originally Posted by dshealey
Most of us learned early that that little vibration is the built in signal to hold on, the fun is about to begin!

I love it.


about 4,500-4,750 on my '04. Used to really irritate me, especially when I'd cruise at a speed that was right in that range. So I just ride five mph faster now.

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post #9 of 12 Old Oct 21st, 2007, 9:25 pm
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My SO likes that speed.


John

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post #10 of 12 Old Oct 22nd, 2007, 12:57 pm
 
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Vibration

I had the same problem with my '99 K LTC. At 100,000 miles I had the exhaust changed out as it was starting to "leak" a bit. My vibration went away! It is now completley smooth at all RPM's.
Mike Shelton
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post #11 of 12 Old Oct 22nd, 2007, 1:42 pm
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does the bike get alot louder with the exhaust change?

TBob
09 R1200 GSA
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post #12 of 12 Old Oct 22nd, 2007, 2:51 pm
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Although there can be several contributing factors to the 4500 to 5000 vibrations I found that putting in new spark plugs and adjusting the valves decreased the vibration considerably.
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