vibration

[mumfy]

my 1150gs has started to vibrate through the seat at between 70-90mph at times its so bad a have to slow down, looked the drive shaft but cannot hear or feel a problem, can it be that the injectors need balancing?

 

[littleredrooster]

Indeed, and a doddle of a job it is if you have a set of gauges or a Twinmax. I balance mine about every 3000 miles to keep it sweet.