High pitched whistle from engine??? - K-Bikes.com - Excellence in Motion
 
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post #1 of 10 (permalink) Old Jun 5th, 2019, 8:33 am Thread Starter
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High pitched whirling noise from engine???

Just noticed a high pitched, barely audible whirling noise at RPM's higher than idle.

The bike is an '02 K12RS.

No other noted issues.

Best heard when the bike is on the center stand.

Normal???

Last edited by Wildbears; Jun 5th, 2019 at 10:34 am.
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post #2 of 10 (permalink) Old Jun 6th, 2019, 6:39 am
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Either you've got tinnitus or you've left the kettle on . . .?
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post #3 of 10 (permalink) Old Jun 6th, 2019, 12:34 pm
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Loose exhaust header bolts and leaky connection to the block? Pin hole in exhaust pipe?

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post #4 of 10 (permalink) Old Jun 6th, 2019, 5:07 pm Thread Starter
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The noise is coming from the engine and is mechanical in nature.

May be normal?
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post #5 of 10 (permalink) Old Jun 8th, 2019, 11:25 am
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High pitched whirling sound? Camshaft chain or tensioner. My K100RS was making such noises when the tensioner liner wore out. Same with another rider I met as he was getting his bike diagnosed at a BMW shop. They mechanics were at a loss so I pulled him aside and told him what was up with his bike.


I had a few funny noises coming out of that area on my K1200RS. No wear at the tensioner but at 270,000 kms I did have chain slack and a little gears wear. Plus the chain was starting to rub in the guide between the cams. So? New to me complete assembly/gears,chain with less than 20K (miles), $50.00 US on fleabay and my bike is now quieter. And runs better with cam timing back to factory specs.

Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53
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post #6 of 10 (permalink) Old Jun 8th, 2019, 12:34 pm Thread Starter
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Thanks.

Will take bike into shop.

Going into the engine on my own is currently outside of my wheelhouse.
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post #7 of 10 (permalink) Old Jun 13th, 2019, 12:04 am
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Chain tensioner was the first thing I thought of as well

I did mine. I thought it would be difficult, but it wasn't. Get a Climber guide and look through Youtube videos and it will take time and effort, but it is not that difficult.
I wrecked my bike and basically rebuilt the engine. The main takeaway I got from the experience is that it was not as difficult as I thought it would be. You may want to replace the rails and front crank oil seal while you are at it. Just make sure you set the valve cams and the crank properly to get the timing correct. the manual will take you through it.

Rick Mead
2004 K1200GT Orient Blue
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post #8 of 10 (permalink) Old Jun 13th, 2019, 12:59 am
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And the clutch housing 19x4 oring in the back. Get a viton one, not Buna-N. PM me for a free one.

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post #9 of 10 (permalink) Old Jun 13th, 2019, 7:19 am Thread Starter
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Thanks to CrazyDiamond & Beech!
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post #10 of 10 (permalink) Old Aug 15th, 2019, 12:16 pm Thread Starter
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So being a procrastinator, never got it to the dealership but after riding a bit, the noise went away.

Might have been from lack of oil on cam chain from sitting in the garage this past winter?

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