General topics » Engine noise?

Here is question about my “new” r1200rs, 37k kms. I won’t be able to ride it probably for another two months (its Canada!), but listening to idling engine it is definitely noisier than my previous four air/oil cooled 1200s. I couldn’t hear anything abnormal in this noise or any difference between left or right cylinder, just noisier than I expected. I alwasys appreciated how quiet the 1200 hexheads were, especially after warmed up. What are your observations/experience, are the 1250s any different?

I was also surprised how noisy our R1200 engines were at idle compared to previous K bikes.
The R1250 is quieter.
It helps that I wear ear plugs.

Zitat von Lee im Beitrag #2

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I was also surprised how noisy our R1200 engines were at idle compared to previous K bikes.
The R1250 is quieter.
It helps that I wear ear plugs.

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Agreed. The LC boxers with gear/chain driven camshafts are noticeably noisier. My 2011 camhead R1200R was far more subdued.
The R1250 slightly quieter than the LC R1200 possibly due the type of chain used? The 1250 has solid link plate chain rather than the 1200 roller chain.
One would think the water jacket would deaden the clatter more than it does.
It's a bit of a non-issue really.

I was told by BMW that its the decompression cam that rattles at idle.

Zitat von Steady Eddie im Beitrag #4

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Agreed. The LC boxers with gear/chain driven camshafts are noticeably noisier. My 2011 camhead R1200R was far more subdued.
The R1250 slightly quieter than the LC R1200 possibly due the type of chain used? The 1250 has solid link plate chain rather than the 1200 roller chain.
One would think the water jacket would deaden the clatter more than it does.
It's a bit of a non-issue really.

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Zitat von Beebop im Beitrag #5

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I was told by BMW that its the decompression cam that rattles at idle.

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Are you sure it's not because you haven't got any earplugs in if you are just firing it up in the garage? I was always surprised how noisy my XR was when I forgot to put plugs in

Anyone remember the good old days, when you wanted to hear valve clatter on an airhead? That told you that the valves were likely in adjustment and were not too tight. Things are different now. Most modern valve trains rarely need any adjustment after the break-in period.

The cracking and clonking of my knees and hips drowns out any tappet noise.....

Alan