The things i think GS "should have" to be a buy and ride type bike are following.
-Stock bike has 1.6 inch wide rim and 3.00-18 tyre at the rear. It should come with 2.15 inch wide rim and a 90/90-18 tyre at least, which i have done to my bike
(i have used 100/90-18 tyre also, but felt that it was affecting performance so finally chose 90/90-18)
-Stock bike has 1.4 inch wide rim and 2.75-18 tyre at front. Tyre size is fine but rim should be 1.6 inch at front. I did this one too
-No locks in side tappas, making tappas prone to fly off while riding at high speed. So locks should be there. I have made small hole with kaawya and use cable ties with pipe frame to hold them tight.
-Final one is disk brake. It should have disk brake at front.
And about speedometer, it records 95Km/h on my mobile GPS when it is at 100Km/h on meter.