1250 buzzing / vibration

[Monikakaka]

Hi, I’ve recently come back to GS’s after a break of 6 years. I have a 2023 1250 Rallye. I have noticed a distinct increase in buzzing / vibration above circa 4500rpm, irrespective of gear, mode, speed etc. so it’s not tyres or drivetrain. It even does it stationery. The bike is smooth as you like up to 4500rpm but then a distinct mild vibration starts through the bars, foot pegs ( I’ve put rubber inserts in but it’s made no difference) and the seat simultaneously. It remains, but doesn’t get any worse as you go up the rev range. I’ve booked it in as it’s under warranty, but there is nearly a 4 week lead time. As I don’t have access to another bike I thought I would canvas you guys for some input. It’s not shaking itself to bits, just a distinct change from smooth to a vibey buzzing sensation at 4500rpm. I don’t remember my 1150 or 1200 being like this, unless the throttle bodies were out of sych but it wouldn’t just start at a certain rev count. And this is a bike with only 1200 miles on it???. Thanks in anticipaton.

 

[GSMarky]

I've a new in Nov' 23 GSA Trophy and haven't noticed anything buzzing related.

 

[Monikakaka]

I've a new in Nov' 23 GSA Trophy and haven't noticed anything buzzing related.

Many thanks, I am certain it’s a problem now, but it’s so mild I keep wondering if it’s a case of “they all do that sir”. Il see what Vertu say in June. Should be interesting



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[Bigcats]

Hi, I’ve recently come back to GS’s after a break of 6 years. I have a 2023 1250 Rallye. I have noticed a distinct increase in buzzing / vibration above circa 4500rpm, irrespective of gear, mode, speed etc. so it’s not tyres or drivetrain. It even does it stationery. The bike is smooth as you like up to 4500rpm but then a distinct mild vibration starts through the bars, foot pegs ( I’ve put rubber inserts in but it’s made no difference) and the seat simultaneously. It remains, but doesn’t get any worse as you go up the rev range. I’ve booked it in as it’s under warranty, but there is nearly a 4 week lead time. As I don’t have access to another bike I thought I would canvas you guys for some input. It’s not shaking itself to bits, just a distinct change from smooth to a vibey buzzing sensation at 4500rpm. I don’t remember my 1150 or 1200 being like this, unless the throttle bodies were out of sych but it wouldn’t just start at a certain rev count. And this is a bike with only 1200 miles on it???. Thanks in anticipaton.

I notice you say Rallye

I am assuming you have the standard pegs which do not have the rubber inserts (so your foot is directly onto a metal peg)

I also have a Rallye (2019 GSA) but I fitted the inserts....I feel no vibration/buzzing

 

[stever1]

Hi, I’ve recently come back to GS’s after a break of 6 years. I have a 2023 1250 Rallye. I have noticed a distinct increase in buzzing / vibration above circa 4500rpm, irrespective of gear, mode, speed etc. so it’s not tyres or drivetrain. It even does it stationery. The bike is smooth as you like up to 4500rpm but then a distinct mild vibration starts through the bars, foot pegs ( I’ve put rubber inserts in but it’s made no difference) and the seat simultaneously. It remains, but doesn’t get any worse as you go up the rev range. I’ve booked it in as it’s under warranty, but there is nearly a 4 week lead time. As I don’t have access to another bike I thought I would canvas you guys for some input. It’s not shaking itself to bits, just a distinct change from smooth to a vibey buzzing sensation at 4500rpm. I don’t remember my 1150 or 1200 being like this, unless the throttle bodies were out of sych but it wouldn’t just start at a certain rev count. And this is a bike with only 1200 miles on it???. Thanks in anticipaton.

Could it be to do with the cam timing changing thingy ? , that works at about 4500 rpm I think.

Just checked, the thing I’m thinking of is the shift cam stuff

 

[Monikakaka]

I notice you say Rallye

I am assuming you have the standard pegs which do not have the rubber inserts (so your foot is directly onto a metal peg)

I also have a Rallye (2019 GSA) but I fitted the inserts....I feel no vibration/buzzing

I’ve mentioned the rubber peg inserts in my original text. Makes no difference. It’s not just the pegs, it’s the seat and handlebars simultaneously as stated. Thanks

 

[Monikakaka]

Could it be to do with the cam timing changing thingy ? , that works at about 4500 rpm I think.

Just checked, the thing I’m thinking of is the shift cam stuff

Yeah, that’s very true and a good point!! The throttle bodies are balanced via software so maybe a reset also. Thanks for the reply, it’s convincing me it’s not normal that’s for sure. I’ll keep my dealer appt in June

 

[Golf Sierra]

I experienced a vibration through the ‘bars at c. 4,000 rpm on my 2020 1250 Rallye (bought new at the time). I noticed it mostly through the ‘bars (typically I knew I was at/around 4,000 rpm without looking at the rev counter simply because of the ‘bar vibe ). While I had the rubber inserts in the foot pegs I never really noticed the vibration anywhere other than through the ‘bars.

I fitted Evotech-Performance’s bar end weights - problem solved immediately. An added bonus was that the EP bar end weights were of great quality and well packaged. I was very pleased with them.

 

[Monikakaka]

I experienced a vibration through the ‘bars at c. 4,000 rpm on my 2020 1250 Rallye (bought new at the time). I noticed it mostly through the ‘bars (typically I knew I was at/around 4,000 rpm without looking at the rev counter simply because of the ‘bar vibe ). While I had the rubber inserts in the foot pegs I never really noticed the vibration anywhere other than through the ‘bars.

I fitted Evotech-Performance’s bar end weights - problem solved immediately. An added bonus was that the EP bar end weights were of great quality and well packaged. I was very pleased with them.

Thanks for this. Another good suggestion. If the dealer states it’s all good, I’m going to install some aftermarket bar ends. My current experience of bars, seat and pegs is driving me to the dealer as it’s still under warranty. As there is a fair wait time I’m obviously trying to establish whether this is known or a common problem. There’s not much on the net, which suggests it’s not normal. Thanks for taking the time to reply

 

[GSMarky]

Thanks for this. Another good suggestion. If the dealer states it’s all good, I’m going to install some aftermarket bar ends. My current experience of bars, seat and pegs is driving me to the dealer as it’s still under warranty. As there is a fair wait time I’m obviously trying to establish whether this is known or a common problem. There’s not much on the net, which suggests it’s not normal. Thanks for taking the time to reply

Evotech kit is quality..

I'd just go ride a couple of others from the dealer to see if yours is different.

 

[Monikakaka]

Evotech kit is quality..

I'd just go ride a couple of others from the dealer to see if yours is different.

Yes, that’s the plan. Further investigation into shift cam, the exhaust cam can be rotated independent from its timing sprocket ( you tube vid ) and is only held in place by 1 bolt. The same goes for the timing reluctor. I am no technician but I know enough to think a slight mismatch between either of the above at the factory will cause vibration. Either way it’s under warranty so we will see. Thanks again


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[Mulcher]

I did notice vibration through the bars on my 2019 GSA Rallye TE so I fitted Evo-Tech bar-end weights and Grip Puppies which have reduced vibes to the point I don’t really notice them anymore.

 

[Bigcats]

I’ve mentioned the rubber peg inserts in my original text. Makes no difference. It’s not just the pegs, it’s the seat and handlebars simultaneously as stated. Thanks

Something else I also fitted was the barkbusters which have the huge bit of aluminium that probably also helps.

 

[big fella]

Is there an Akropovic pipe on it? I recently had my 1250 non akroed bike in for a service and they gave me a loaner 1250 with an akro fitted and my hands were tingling like hell after riding the dealer bike.
Bf.

 

[Monikakaka]

Not it hasn’t, but that’s interesting. It’s so minimal ( although a couple of hours riding would be really annoying) it’s only bothering me because I know it shouldn’t do it. I reckon the intake cam is slightly off on one cylinder or the attached timing sensor reluctor that’s attached to it. However, as it’s under warranty it’s going in, in June!! Thanks for the suggestion.

 

[EPG_19]

there is vibration, but its less than the 1000xr

 

[Pukmeister]

Having watched a ton of cam timing videos, it seems 1250 cam timing settles after about 2k and ideally needs resetting, presumably some initial stretch to the cam chains or bedding in wear to the guides after assembly.

The cam timing reluctor is driven off the left cylinder exhaust cam. It needs special tooling to set and lock at TDC, pre-tension the cam chain and then set the cam timing in the correct position using jigs before torquing the cam drive bolts. Best to reset valve clearances if necessary beforehand which entails cam removal for reshimming.

If the cam timing reluctor is out of timing relative to TDC it will have a negative effect on both ignition and fuel injection.

FWIW my 2019 is like yours, I hope to get mine sorted at its next service in late June.


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[ktmman]

This is what I found when I test drove a 1250rt last year. I thought it was the fairing reducing wind noise and letting me focus on the engine noise/vibration.
I'm sure it was from the gearbox. Who knows. It was quote dissapointing.
Hope you get a favourable response from the dealer.

 

[Monikakaka]

Having watched a ton of cam timing videos, it seems 1250 cam timing settles after about 2k and ideally needs resetting, presumably some initial stretch to the cam chains or bedding in wear to the guides after assembly.

The cam timing reluctor is driven off the left cylinder exhaust cam. It needs special tooling to set and lock at TDC, pre-tension the cam chain and then set the cam timing in the correct position using jigs before torquing the cam drive bolts. Best to reset valve clearances if necessary beforehand which entails cam removal for reshimming.

If the cam timing reluctor is out of timing relative to TDC it will have a negative effect on both ignition and fuel injection.

FWIW my 2019 is like yours, I hope to get mine sorted at its next service in late June.


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It looks as if we have come to similar conclusions. I’ll post BMW’s take on all this after next Wednesday, when it’s booked in. Thanks for taking the time to post.

 

[Pukmeister]

I’m trying to assemble all the tooling in slow time to do this job myself, the biggest issue is the cam chain tensioner tool. My bike is a keeper and I want to do my own servicing and repairs next year once it’s out of its extended warranty.


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