I have a Suzuki gz125 marauder and there seems to be excessive play on the gear shifter. I also have a problem selecting neutral. I don't know if these problems are connected, but any advice would be appreciated

SOURCE: Gear shifter adjustment

The VZ 800 ,has a linkage system ,it can be adjsted to suit your needs .Firstly , your linkage attaches to the front foot lever.on the other end the linkage attaches to the actual gear box.Its this part that you need to adjust ,Undo the bolt that holds the linkage bracket to the gearbox spline. slide the bracket of the spline .undo all the adjusting screws on the linkage rod ,position the gearbox linkage unit to the required angle you need to position the foot lever to the popsition you want and the adjust the linkage rod to suit the distance between the garebox liinkage unit and foot change.