scope
Guest
Does anybody out there have a problem with a strange rythmic vibration on R1150GS Adventure in 4th gear between 3 and 4 thousand RPM (the bike is 6 weeks old with 1500 miles up) - the vibration is different to normal engine vibration.
- Joined
- Aug 14, 2003
- Messages
- 9,429
- Reaction score
- 427
Sounds like your experienceing the GS surging problem. Between 3 and 4 thousand rpm
It's normal, you can try and get your dealer to sort it but he might not be able to.
It's normal, you can try and get your dealer to sort it but he might not be able to.
scope
Guest
It different to the 'normal' surging, it's only in 4th and between 3 & 4 thousand RPM and it's a vibration rather than a surge 
YoYo
Guest
Sounds like the throttle bodies might be out of sync, that or the valves.
scope
Guest
YoYo said:
But would it not effect all gears not just 4th if it was either of these, or am I missing some thing here ?
slimbo
Registered user
Re: Re: Rythmic vibration
so cane the tits off it??wessie said:
scope
Guest
OK, so you're saying don't worry about it, it's normal, and ride through it and ring the nad's off it? Cheers men, I feel a bit better now 
theclowncrusty
Guest
Had a similar sort of thing on my R1100S certain gear, certain revs. Something to do with the harmonics in the engine-gearbox. Dont worry about it..."They all do that sir....."
The Clown
The Clown
Dazzla
Guest
Yep, I agree with the others, mine does that too. Don't notice it that much now as I seem to just ride throught it.
Allan McGill
Guest
Rhythmic vibration
If your adventure has knobby tyres on it, it could be the tyres.
After a similar distance travelled on mine, the same rhythmic vibration appeared.
Each tyre has it's own wavelength rhythm and as the diameters are different, a periodic wave patern is experienced where the two wave patterns complement each other (Constructive wave interference) instead of cancelling each other out.
When you change your tyre pressure, or change the tyres, the rhythm changes or goes away.
Ride on!
If your adventure has knobby tyres on it, it could be the tyres.
After a similar distance travelled on mine, the same rhythmic vibration appeared.
Each tyre has it's own wavelength rhythm and as the diameters are different, a periodic wave patern is experienced where the two wave patterns complement each other (Constructive wave interference) instead of cancelling each other out.
When you change your tyre pressure, or change the tyres, the rhythm changes or goes away.
Ride on!
scope said:It different to the 'normal' surging, it's only in 4th and between 3 & 4 thousand RPM and it's a vibration rather than a surge
It sounds like fun!
Good vibrations, like in The Beach boys song?
May I borrow it? Liv.Dutch
Guest
I'm having the same vibrations as mentioned on my 2 weeks old r1150gs adventure.
Also between 3000 and 4000 rpm in 4th gear
I'll just live with it.
Also between 3000 and 4000 rpm in 4th gear
I'll just live with it.
scope
Guest
Thanks men, Allan your explanation makes a lot of sense, cheers.
Duch, is your GSA fitted with T66's? just wandering if it's specific to these tyres... mine is just 5 weeks old.
Duch, is your GSA fitted with T66's? just wandering if it's specific to these tyres... mine is just 5 weeks old.
theclowncrusty
Guest
T66...
Mine is fitted with these tyres, and while i do like them for they seem to be lasting a long time....
A:- they are shite in the wet.
B:- At slow speeds the profile of the tread reminds me of my old grifter....... (Come on lads you know what i am on about!!!....LOL)
Mark
Mine is fitted with these tyres, and while i do like them for they seem to be lasting a long time....
A:- they are shite in the wet.
B:- At slow speeds the profile of the tread reminds me of my old grifter....... (Come on lads you know what i am on about!!!....LOL)
Mark
temoore
Guest
Mine (2001 GS) had a similar issue, mostly when accelerating in that range. It seemed to occur in no other gear. It either eventually went away or I got used to it, not sure.
goggstrotter
Guest
i've never noticed this before untill i had the output seal from the gearbox replaced yesterday and now in 4th @ 3500rpm i am noticing this wierd hunting like sensation. is that a coincedence or what ?
The Mechanic
Guest
Rythmic....wan.....vibration!
4th gear, 2,800 rpm - 3200ish rpm rythmic vibration = surging.
If it was g/box related there would be other signs, syptoms.
4th gear is magnifying the surging as it can have more effect through the drive shaft over a more constant period...you tend to be in 4th longer than the other lower gears. Example accelerate well in 1st, 2nd, and 3rd, then snick (or kick in some cases) into 4th and cruise ......'was at'.....vibration....thinks ....can't be tyres else it'd do it in any gear (Adventure nobblies tend to vibrate at lower speeds....they have lower gearing as well so effects are at different engine rpms).....can't be bent shafts in the box cause ther'd be other noises....oval wheel...naah.. too easy to check...oval tyre..naah... too easy to check......oval drive shaft....naah it'd do it in any gear....any way the engines quieter in 4th so I can concentrate more on whats going wrong next!
Surging is the cause and surging is the cause of alot of other transmission related problems....like jumping out of gear occasionally....oil seal leaks due to constant choppiness in the transmission line causing shaft wobble in the seal housings....you work it out and try and put it into words.
Once again its surging. Do what the others suggest and get your bodies balanced etc.
4th gear, 2,800 rpm - 3200ish rpm rythmic vibration = surging.
If it was g/box related there would be other signs, syptoms.
4th gear is magnifying the surging as it can have more effect through the drive shaft over a more constant period...you tend to be in 4th longer than the other lower gears. Example accelerate well in 1st, 2nd, and 3rd, then snick (or kick in some cases) into 4th and cruise ......'was at'.....vibration....thinks ....can't be tyres else it'd do it in any gear (Adventure nobblies tend to vibrate at lower speeds....they have lower gearing as well so effects are at different engine rpms).....can't be bent shafts in the box cause ther'd be other noises....oval wheel...naah.. too easy to check...oval tyre..naah... too easy to check......oval drive shaft....naah it'd do it in any gear....any way the engines quieter in 4th so I can concentrate more on whats going wrong next!
Surging is the cause and surging is the cause of alot of other transmission related problems....like jumping out of gear occasionally....oil seal leaks due to constant choppiness in the transmission line causing shaft wobble in the seal housings....you work it out and try and put it into words.
Once again its surging. Do what the others suggest and get your bodies balanced etc.
Similar threads
