Vibration at 4000rpm - BMW Luxury Touring Community
 
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post #1 of 11 Old Jun 13th, 2013, 7:31 am Thread Starter
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Vibration at 4000rpm

Hi everyone I have at 99 k1200LT. When I ride and get the motor up to 4000rpm there's a vibration in the engine then it smoothes out at about 4400rpm. The motorcycle is due for a tune up but should I be concerned? My bike has 45k on the clock. Otherwise it's running great. It's just the vibration. I'm going to change the oil, oil filter air filter fuel filter spark plugs add a power plug for my gps. And change the final drive oil. Is there anything else that I should take a look at when I strip the ol' lady down to do the maintenance. Maybe a valve check? I don't hear the valves clanking like a loose valve would? Anyway any help would be appreciated. Thanks. Paul
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post #2 of 11 Old Jun 13th, 2013, 7:43 am
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Re: Vibration at 4000rpm

it sounds familiar........just MHO, but I think we all feel that right about the same RPM range........I wouldn't get too concerned............sounds like your maint program should be good.........on the K engine, the valves get tighter, not looser........to adjust them, you actually change out what we call ' the buckets' each of which is stamped with the amount of thickness they have.........might want to check out the Clymer manual on that ........



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post #3 of 11 Old Jun 13th, 2013, 7:57 am
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Re: Vibration at 4000rpm

Click here for a tutorial on checking K-engine valves. Slow and easy on your maintenance project. Hard part is getting up off the floor!!
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post #4 of 11 Old Jun 13th, 2013, 1:10 pm
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Re: Vibration at 4000rpm

There is a K-Bike Buzz and it occurs around 4,000 - 4,200 rpm (a little lower on the 05 and up). Normal.

Valves do not normally wear loose in this engine.

John
2009 K1300GT Red Rocket
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But lack DE, MA, RI and CT with the 2005 LT

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post #5 of 11 Old Jun 13th, 2013, 2:24 pm
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Re: Vibration at 4000rpm

Quote:
Originally Posted by jzeiler
There is a K-Bike Buzz and it occurs around 4,000 - 4,200 rpm (a little lower on the 05 and up). Normal.------------.
Commonly called "K-Whine". Very normal. Most of us decided that is the signal that the engine is waking up, as she really starts to perform above 4,000.

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 #6 of 11 Old Jun 14th, 2013, 8:06 am
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Re: Vibration at 4000rpm

I look at it as the "We're about to enter launch sequence" reminder. This bike comes alive at that point, but hold on!

Ray Rau
Brewster, NY
'99 LT - Champagne
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post #7 of 11 Old Jun 14th, 2013, 12:26 pm
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Re: Vibration at 4000rpm

I get the buzz at about 4,500 rpm. I just ignore as the revs move past... :-)

Brian
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post #8 of 11 Old Jun 14th, 2013, 6:06 pm
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Re: Vibration at 4000rpm

It my most hated speed. 77mph on the gps. 4000-4200.... Damn I hate that speed! Mine runs best over 80 or under 75.

You could watch my vid on valve check in addition to that excellent article. http://www.illinoisbmwriders.com/ins...learence-check

Hey Dick, what is it gonna take to get you to promote my work?

2000 K1200LT-C "Tsukune"
2013 Honda NC700X "Moka"

Kirk Johnson

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post #9 of 11 Old Jun 14th, 2013, 6:56 pm
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Re: Vibration at 4000rpm

Quote:
Originally Posted by 14wntr
It my most hated speed. 77mph on the gps. 4000-4200.... Damn I hate that speed! Mine runs best over 80 or under 75.

You could watch my vid on valve check in addition to that excellent article. http://www.illinoisbmwriders.com/ins...learence-check

Hey Dick, what is it gonna take to get you to promote my work?
Hey, Kirk - my bad. Didn't realize you had the tutorial running on the valve check and adjustment procedure. I've added all your latest DIY videos to my fav folder now and will sure promotecha when I can, Kirk. Didn't mean to slight ya.

Great job, BTW --- our forum folks are lucky to have you as a member, sharing your expertise.
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post #10 of 11 Old Jun 14th, 2013, 7:21 pm
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Re: Vibration at 4000rpm

No slight taken. Just want to be included in your library. Thanks!

2000 K1200LT-C "Tsukune"
2013 Honda NC700X "Moka"

Kirk Johnson

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post #11 of 11 Old Jun 15th, 2013, 8:08 am Thread Starter
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Re: Vibration at 4000rpm

Thanks everyone for the responses. Glad that I don't need to worry about the K-bike buzz. I'm not afraid to get the engine revving past the 4k. But wanted to find out about the
" buzz" Thanks for the link to valve adjustments will take a look. I've been doing all the maintenance myself so it's no big deal. Exept for changing the tires that I have the dealer take care of. Thanks again for the help Paul
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