The odometer on my 2009 GZ just turned over 20K yesterday. I was thinking back on how reliable it has been and how little I have had to do to keep it in tip-top running shape.
1) New tires at 12K.
2) A couple of valve adjustments.
3) Fuel petcock repair kit.
4) New chain.
5) Minor wiring repair.
6) Replaced original battery with a Lithium Ion battery (awesome).
That is it other than normal maintenance. Have to give Suzuki credit for building a great bike.
