Numbing Buzz in Throttle - K-Bikes.com - Excellence in Motion
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post #1 of 14 (permalink) Old Jul 11th, 2012, 5:59 pm Thread Starter
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Numbing Buzz in Throttle

I just picked up a 2007 K1200GT with 24,000 miles. It takes awhile to get used to it but I mostly love everything about it except for... the numbing buzz in the throttle at 4000RPM plus. Most notably at the RPM range you're in when cruising down the highway. This numbing comes on after only a couple minutes.

Got the the bike checked over by my trusted BMW dealer, oil changed, new tires installed and balanced but made no difference. They claim they have never had any such complaint before, everything looked in order and were stumped as to where to look.

Do I have a mechanical issue?

Quite honestly I'm considering selling it if this is the way it's going to be. My R models didn't have anything like this. I was looking forward to long trips on this bike but there is no way possible with this buzz.

For a little background I've owned nothing but BMW since 1985 starting with a 1985 K100RS, K75S, R1100GS, R1150R and a few others so I'm not a newbie to some of the quirkiness of the BMW brand.
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post #2 of 14 (permalink) Old Jul 12th, 2012, 5:08 pm
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I'm sure you'll get a lot of opinions but mine is that all these bikes tend to do that. my '10 K1300GT does it and my '06 K1200S did it. basically the same platform. most annoying. right at the sweet spot.

if there's two items I don't like about these wedge bikes it is a) they're buzzy and b) their surplus farm equipment transmissions. but u already know about the trannys. both r very noticable having just come off a C14 Concours. But, I have to tell u, u really can't compare it to the bikes u listed. I wouldn't give up the GT too fast. u'll love this bike.

Last edited by mesnkc; Jul 12th, 2012 at 5:36 pm.
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post #3 of 14 (permalink) Old Jul 12th, 2012, 9:00 pm Thread Starter
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Problem Solved, I Think

Well as it turns out the original owner either installed or had installed a bar adapter. So I removed it and took it back to the stock arrangement and made sure to torque the bolts to the correct specs. I've found out from previous experience you aren't doing yourself any favors by over tightening your handlebar bolts.

A preliminary ride had good results but all I had was a couple of highway miles in before I got rained on. So the new tires and the handlebars got an all too brief testing.
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post #4 of 14 (permalink) Old Jul 12th, 2012, 9:27 pm
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Hope that works for you. If you still have some buzziness, try Grip Puppies. My 2007 has some buzzy to it. I think it has something to do with the 4 across cylinders. Not bad, just there. Never in the pegs.
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post #5 of 14 (permalink) Old Jul 12th, 2012, 10:15 pm
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The original Concours 1000 was a bit buzzy, some bikes worse than others. Then some of the COG riders figured out that you could adjust the counter-rotating balance shafts to minimize that buzz. Not eliminate it, but at least bring it down some.

I've never heard of a similar procedure being done on a Slant/4 engine, but I did notice that there are a couple of adjustment spots down low on the engine, so I'm guessing it is possible.

But I think it's another one of those BMW we-adjusted-it-at-the-factory-so-it's-perfect-and-don't-you-ever-touch-it things.

Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #6 of 14 (permalink) Old Jul 13th, 2012, 12:10 am
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My K1300GT has definately got less buzzy as the miles have gone on, yesterday I passed the 20k mark, in 10 months, and I would almost describe her as super smooth. Now, one thing I have found is that I cant wear real thin gloves, which with our weather isnt a big problem recently . But I have kept meaning to get some grip puppies which Iv used on previous bikes and have been great for this kind of issue, thing is, the bikes so much better Im not sure I need em, unless we do get a heat wave that is, huh

Tim
------------------

2011 K1300GT
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post #7 of 14 (permalink) Old Jul 13th, 2012, 5:15 am
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Quote:
Originally Posted by Meese
But I think it's another one of those BMW we-adjusted-it-at-the-factory-so-it's-perfect-and-don't-you-ever-touch-it things.

Ahh yes.....the BMW Mattress Tag
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post #8 of 14 (permalink) Old Jul 13th, 2012, 1:41 pm Thread Starter
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1st Test Drive

Quote:
Originally Posted by Special-K
My K1300GT has definately got less buzzy as the miles have gone on, yesterday I passed the 20k mark, in 10 months, and I would almost describe her as super smooth. Now, one thing I have found is that I cant wear real thin gloves, which with our weather isnt a big problem recently . But I have kept meaning to get some grip puppies which I've used on previous bikes and have been great for this kind of issue, thing is, the bikes so much better Im not sure I need em, unless we do get a heat wave that is, huh
Problem was only slightly resolved after changing the handlebar setup back to stock. Plus I purchased a pair of gloves to ride with. I ride without gloves rain or shine because I don't like the added thickness.

I know some might think I'm making a big deal out of nothing but for 10 straight minutes I held on to the throttle and my hand was so numb I could barely feel the front brake lever. To me this makes it a serious problem.

I had one Grip Puppy left over after removing them from my previous bike and have installed it and am awaiting a chance to get out and test this setup.
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post #9 of 14 (permalink) Old Jul 13th, 2012, 6:41 pm
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Quote:
Originally Posted by ItsPhilD
Problem was only slightly resolved after changing the handlebar setup back to stock. Plus I purchased a pair of gloves to ride with. I ride without gloves rain or shine because I don't like the added thickness.

I know some might think I'm making a big deal out of nothing but for 10 straight minutes I held on to the throttle and my hand was so numb I could barely feel the front brake lever. To me this makes it a serious problem.

I had one Grip Puppy left over after removing them from my previous bike and have installed it and am awaiting a chance to get out and test this setup.
If you think your hands hurt from buzzing wait until you (I hope it never happens!) slide across the pavement with no gloves on.

2008 K1200GT, Custom Paint, Vivid Black, Aeroflow WS & Aeroguards, Givi E52 Maxia Topcase w/AdMore Lighting, Zumo 660, Suburban Footpeg Lowering, Sargent Seat

2009 R1200GS Adventure, Magnesium Grey/Black, Adventure Cases, Zumo 660, Touratech Unobtanium Accessories

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post #10 of 14 (permalink) Old Jul 13th, 2012, 8:17 pm
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Quote:
Originally Posted by lhendrick
If you think your hands hurt from buzzing wait until you (I hope it never happens!) slide across the pavement with no gloves on.
+1

I still vividly remember almost 20 years ago when they went after the asphalt and gravel embedded in my hands with a scrub brush. Even being hopped up on Vicodin, it still hurt like a bitch.

Never again.

Ken
Pacific NorthWet
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032

All lower 48 states plus Alaska on the K13GT in two weeks . . .

Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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