Exhausts and Engine » Brief rattle on warm startup, anyone else?

Hi All, So I have 900k's on the new bike and am going to book it in for it's 1000k first service. I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. It's only momentary and it's worse if the bike has been on the side stand for 15 or 20 minutes. I havn't noticed it when the engine is cold. I am going to mention to BMW when booking it in for it's service but wanted to know if anyone else has experienced this before they tell me it's 'normal'. I didn't notice it on my 2010 R1200R aircooled when I had that?

Zitat von Oz Beemer im Beitrag #1

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Hi All, So I have 900k's on the new bike and am going to book it in for it's 1000k first service. I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. It's only momentary and it's worse if the bike has been on the side stand for 15 or 20 minutes. I havn't noticed it when the engine is cold. I am going to mention to BMW when booking it in for it's service but wanted to know if anyone else has experienced this before they tell me it's 'normal'. I didn't notice it on my 2010 R1200R aircooled when I had that?

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Zitat von Oz Beemer im Beitrag #1

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I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. I

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Zitat von Grumpy Goat im Beitrag #3

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Zitat von Oz Beemer im Beitrag #1

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Hi All, So I have 900k's on the new bike and am going to book it in for it's 1000k first service. I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. It's only momentary and it's worse if the bike has been on the side stand for 15 or 20 minutes. I havn't noticed it when the engine is cold. I am going to mention to BMW when booking it in for it's service but wanted to know if anyone else has experienced this before they tell me it's 'normal'. I didn't notice it on my 2010 R1200R aircooled when I had that?

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Please check your oil level and tell us what you find.

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Zitat von boxter im Beitrag #4

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Zitat von Oz Beemer im Beitrag #1

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Hi All, So I have 900k's on the new bike and am going to book it in for it's 1000k first service. I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. It's only momentary and it's worse if the bike has been on the side stand for 15 or 20 minutes. I havn't noticed it when the engine is cold. I am going to mention to BMW when booking it in for it's service but wanted to know if anyone else has experienced this before they tell me it's 'normal'. I didn't notice it on my 2010 R1200R aircooled when I had that?

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I'm assuming that is 9k and 10k or you have a well travelled RS 900,000 miles

Mine rattles the first 3/4 seconds, its just the heads waiting for the oil. does it do the same if its been on main stand for some time and started on main stand?

just thinking, on side stand oil would stay up in left head feeds but drain back off right side, if parked up running on main stand you would expect a balanced sound at start up.


Ged

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Zitat von wessie im Beitrag #8

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Zitat von boxter im Beitrag #4

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Zitat von Oz Beemer im Beitrag #1

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Hi All, So I have 900k's on the new bike and am going to book it in for it's 1000k first service. I have just noticed a fairly loud rattle coming from the right side cylinder head, the last 3 or 4 times I have started it when the motor is warm, about 3 or 4 'rattles' and it's gone. It's only momentary and it's worse if the bike has been on the side stand for 15 or 20 minutes. I havn't noticed it when the engine is cold. I am going to mention to BMW when booking it in for it's service but wanted to know if anyone else has experienced this before they tell me it's 'normal'. I didn't notice it on my 2010 R1200R aircooled when I had that?

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I'm assuming that is 9k and 10k or you have a well travelled RS 900,000 miles

Mine rattles the first 3/4 seconds, its just the heads waiting for the oil. does it do the same if its been on main stand for some time and started on main stand?

just thinking, on side stand oil would stay up in left head feeds but drain back off right side, if parked up running on main stand you would expect a balanced sound at start up.


Ged

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haha

there are some clues the OP is not using miles - new bike and Oz, suggested 900km, as he has pointed out

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Zitat von Grumpy Goat im Beitrag #9

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Zitat von Oz Beemer im Beitrag #6

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So put the bike on centre stand on level surface after riding it and check it 5 minutes later and the motor (oil) is hot. Doing it this way, which is the way the manual says, the oil is just at the top of the red level ring on the sight glass.

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OK so it sound like you have a good oil level. Mine does not rattle like yours appears to rattle, and certainly not when warm vs when cold. As others have said the tendency is to rattle when the engine is cold.

Here is a sound clip of my engine starting up after being off and in my garage for the past 7 hours. The phone used to make the recording was on the right side of the bike's seat with the microphone pointing downwards.

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I agree, if it's loud have it checked.
Hopefully it's just a faulty tensioner.

I note that at least one review of the new F850GS engines have complained about a loud "clacking" noise upon startup. They believe that is the cam chain tensioner rattling for a second or two as the adjuster becomes pressurized by engine oil. So my guess is that your bike probably has a defective cam chain tensioner as my RS doesn't make that noise.

So rang BMW dealer this morning and booked it in for it's 1000k service and spoke about the noise. He said it is the cam chain tensioner repressurising with oil after being on the side stand for 20 minutes with a hot motor. I said it was about 3 really loud 'tap's' and he said I should hear it when they drain and change the oil. The noise will go for about 10 seconds. Anyway I am going to get it checked out when it is serviced.