K11 Owners Group

[Brickhead]

Alright help me out guys, i just join your site, alot of great info. Rode bike over 40+ years mostly Harley, I recently picked up a 87 k100 lt w/13k miles, I'm impress on how this bike handles, but the buzzies are killing me Has anyone researched, heard off, know someone, dreamed of re gearing the driveline so you can tack 3k rpm while doing 70 mph, if not I forced to sell her. I'm awaiting back surgery and the buzzies kill my back after 1 hour riding, I know it would affect power band across the board but I don't need to do 0-80 mph just blinking my eyes. I used to the put putt of a Harley but there has to be a happy medium. Help me out guys or just admit me to funny farm

[Flying Duck]

If you get it properly tuned it shouldn't be buzzy.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[Brickhead]

Duck, talked to you the other night, Thanks for the info but I'm still curious has anyone researched it, I'm go ahead and change plugs, get a sheep skin seat cover etc. Its not just buzzies, maybe the high 'R' vibration, It pisses me off I cant ride her, it a sweet bike, Thanks again

[whyoldbill]

Where are you located, Brickhead?
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'02 - GL1800


The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton

[Flying Duck]

You need to sycnh the throttle bodies and make sure you don't have any air leaks:

1) Crank case breather hose
2) Boots between the TBs and the cylinder head
3) Boots between the intake plenum and the TBs

1 and 2 are common failure points.

You can also add bar ends but getting the bike running properly is the key to getting rid of buzziness.

Some people have changed the gearing on 4V Ks but I've never heard of anyone doing it on a 2V K - especially changing it by 40% like you seem to be suggesting.

Are you riding on a stock seat? Those are AWFUL.

(PS: Dont get a seat made by Rich's Custom Seats)
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[Ted]

Also, don't forget to go around the bike with the BMW manual's torque settings and a good torque wrench and re-torque all the bolts you can find. Loose bolts are a major source of vibration, believe it or not the exhaust header bolts are a major culprit. After 10+ years it is a good idea to give them all a good check.
_________________
Ted
KOG#1

[dwerbil]

Grip Puppies may help too. I put a pair on my K1100RS last month...helps with hand fatigue.
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93 K1100RS ~ 2004 R1150RT ~ 84 RS ~ 78 R100/7 ~ 65 R60/2
Click for pics
Randy at Round Rock, Texas

[DLBass]

If you don't have heated grips fitted (the BMW ones) you could pump the bars full of silicon sealer to absorb some of the vibes (old MX bike trick), and fit super heavy bar end weights. If you have the BMW heated grips, you can still do this, but it's a bit of a faff, and you must be careful with those old and getting brittle wires. Sheepskin on the seat an Airhawk pad, or a different seat from standard will also help.

But like Duck says, get the engine serviced and balanced, it should make the world of difference.

David
_________________
There is only now, yesterday is gone and is unchangeable, tomorrow is uncertain. Live in the moment.

[Flying Duck]

I've heard that filling the bars with lead shot is also very effective.

Another option would be to swap in some K1100LT handlebars as those have weighted bar ends.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

[Brickhead]

I'm in Kingman AZ. you guys been GREAT !!! Laying on ice bags, taking morphine right now, will get back to my bike in few days, Thanks Damm-it

[Wigomas]

I have two things to add to this.

When looking at the Throttle bodies, spray WD40 around the cylinder head to inlet stub joint when running. Any change in running will indicate that the inlet stub 'O' ring needs changing. If fact I think I would change them anyway as they are cheap. While you're at it check vacuum take-off caps for perishing.

Also, some years ago, a local BMW mech told me that the frame can act like a tuning fork if not shimmed.
Sounds weird but true. And this works if the frame is stressed when tightened.
With the bike on the centre stand, loosen the three rear engine mounting bolts (the front two bolts are rubber mounted and don't matter).
This should tell you if the frame is stressed as a gap will be found between the frame and gearbox.
Shim all three bolts out so that the frame isn't stressed when tightened.
I had a K100LT years ago which vibrated quite badly. I found the frame had a 0.0020" gap between the frame and gearbox.
So much better after shimming.
It's another thing to try as it's cheap to do and takes 30 mins tops.
_________________
K1100LTIC

[Geoff]

Some say the Barsnake helps reduce vibration: http://barsnake.com/
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2000 R1100RT
2008 H-D Electra Glide Ultra Classic

[Shoganai]

I haven't read past the OP. Sorry, no time.

Another source is the kick stand / center stand.

It's the major buzz maker on mine and whenever the heck I have time, I'll address it.
_________________
1993 K1100RS aka The Shop Whore
1994 K1100RS aka Blue Streak

The long road is a rainbow and the pot of gold lies there.
So slip the chain and I'm off again,
You'll find me everywhere. I'm a Rover. - JT


Nana korobi ya oki

[merlin geikie]

All of the above advice is sound and solid, even tappets might be an issue.

The bike can be quietened down regarding the buzz

Sounds like your back is the big issue though.... i mean morphine is serious stuff for serious pain.

What I have been doing for the last few years now is to work on strengtening the muscles in my back so that they are strong, especially lower back muscles and abdominal... 'core' muscles.

Kidney belts often help folks too by rigidifying the flexible lower back but it's really a lifestyle thing of strengthening and building up the muscles which hold the whole show in place .

I am sure you know all this anyways as a bad back takes a while to get there but it is just a thought I had for you

All the very best mate and you have done your back a favour by moving off the Hardly

If you persevere with your back strength and the bike fixes, you could be a winner here