Vibration when turning and resonance

Farklepilot

New member
Has anyone heard anything about parts from BMW to fix this issue yet? it's been a few months....
Yes, took my dealer (Canada) quite a bit of digging through "puma" cases. He has found a replacement motor mount assembly that should be installed by end of month.
Sorry, no part number. Will post when I have it.
 

omniphil

Member
Finally got the issue fixed via the service bulletin. Seems like they have put in a stiffer motor mount. I do feel the engine more through the bike now, but the annoying resonance/vibration is gone.
 

MikeC

New member
what did you discover causing the vibration
I found two causes for the engine vibration transfer.
1. the mounting bolt was way too tight, not allowing the cantilever part of the mounting to move .
2. the main cause of the vibration transfer is the slotted washer that under operation it touches ,ever so slightly, the outside of the mounting. this is enough for the vibration
to be transferred into the body of the scooter.
The fix:
1. Remove the nut and slotted washer on the right end side.
2. fit a copper washer with a 16mm inside diameter into the the bolt (photo)
3. fit the slotted washer back but this time with the slotted faces in the horizontal position ( see photo )
4. tighten the bolt again with just a good snug. Do not over tighten it.
In my scooter this simple mod totally transformed the smoothness of the bike.
 

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zeussalmighty

New member
I found two causes for the engine vibration transfer.
1. the mounting bolt was way too tight, not allowing the cantilever part of the mounting to move .
2. the main cause of the vibration transfer is the slotted washer that under operation it touches ,ever so slightly, the outside of the mounting. this is enough for the vibration
to be transferred into the body of the scooter.
The fix:
1. Remove the nut and slotted washer on the right end side.
2. fit a copper washer with a 16mm inside diameter into the the bolt (photo)
3. fit the slotted washer back but this time with the slotted faces in the horizontal position ( see photo )
4. tighten the bolt again with just a good snug. Do not over tighten it.
In my scooter this simple mod totally transformed the smoothness of the bike.
Going to give this a try, it is interesting as the service manual shows the washer should be vertical with 180Nm torque.
 

hannesd

New member
Has anyone heard anything about parts from BMW to fix this issue yet? it's been a few months....
the vibration issues got fixed thanks to a member here that pointed out to me the bolt that goes thrue the engine ,and the nut is under the exhaust. those cannot be tightened too hard. just snug and all vibrations were gone on mine, just with this alone.
 

cvafiadis

New member
I do same as you describe and vibration reduced greatly, the m16 bolt class 10.9 can be tighted up to 335 Nm, i dont know what is the proper torque for this bolt at BMW manual because i dont have access to one, but the amount of power required to untight was excessive high.
Also i saw underneath the engine is a secondary bracket called (auxiliary-swing-arm) in the way to fore, which has a bolt and (3 items marked as 11) and an adjusting nut working as friction plate or so, any one with some informations please about adjustment...
 

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