inch

I purchased a lava red Mot-09 Tracer yesterday and so far have done only 190 kilometres. Very enjoyable except I have decided I need a bit more comfort so have ordered a set of ROX bar risers and plan to have the seating upgraded. The risers will raise the bar approx. 1 inch and move it back...

Anyone had this situation? If I place two long straight edges against the rear tyres and then measure the gap from this edge to the front tyre I have a gap of 1/2 inch on near side and 1 1/2 inch on the offside-a difference of about an inch overall. The straight edges I am using are not flexing...