R1200RS + R1250RS Forum
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1250 RS technology
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Exhausts and Engine
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Strange engine noise under acceleration
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Sun Sep 15, 2019 11:04 pm
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I have a brand new RS1250. It’s my first BMW so maybe this is normal. When I accelerate regardless of the gear, when the engine hits around 4K rpm or so or getting under load....the engine becomes more agricultural sounding...the sound definitely changes...it’s hard to tell if it’s an exhaust rumble or it’s coming from the engine itself but it sounds agricultural for sure...almost metally (I know that’s not a word). Have others experienced this? My bike was in for the 750 mile service and was out fine. They didn’t comment. Please let me know what others experience. I may need to test drive another to see if it’s normal. |
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there is a valve in the exhaust that opens plus you have the shift-cam engine so there will be different sounds when these change from one setting to the other |
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Thanks for the reply. Very helpful input. I hope you are right, it does make total sense. |
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As the owner of many BMW twins and now the owner of a 1250RS, I disagree- |
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They are agricultural beasts
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Yep, I've just got a R1250RS and there is defo a 'growl' (I like to call it) when you press on a bit form low revs. I quite like it. Gives a little character without being loud. Although the sound isn't dissimilar from the noise my 350lc used to make just before nipping up ;-)) Metallic yes. I liked to think it was when it was coming on cam but probably the exhaust valve. |
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Zitat von Whitey im Beitrag #7 Ive found that I get this growl if Im in the wrong gear at lower speeds. Where another engine might lug, this one changes character and then goes. |
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Huh, I find the growl at mid-range. I kind of like it too. |
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I have never had a boxer before, but have noticed that sound as well. I liken it to a growl as the shiftcam does it's magic. As I get more km's on the bike the exhaust is starting to rumble on change down and that growl is becoming more pronounced upon acceleration. I also have a metallic pinging sound when I first get on the throttle that disappears straight after initial acceleleration. They checked it on it's first service and reset some settings. It is still there, but does not seem to affect the performance at all so I am not worried about it. |
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Bringing back a old thread here... |
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Go listen to one of the desmo Ducati's start up........ |
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Zitat von tony.parker im Beitrag #14 I'm sure that has nothing to do with leaving the noisy bits (clutch) out in the open, lol. |
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