I'm sure that radar guns can be extremely accurate at measuring the relative velocity of the reflective items at which they are aimed. I bet you make a great product.
...but, the best calibrated, most accurate device in the world doesn't ensure correct measurements; the combination of the device and the operator does that.
Have you ever seen one of those unattended radar stations on the side of the road? They have a radar gun and a big display that shows "your speed is..."
Have you ever seen them swing wildly from 26 mph to 37 mph and back again, higgldy piggldy, when you're the only one on the road? I have. It's probably because the transmitter/receiver is pointed at the wrong thing. But a police officer could never point a radar gun at the wrong thing, could he?
But a motorcycle is only traveling at one speed, right? So you can just use the maximum reading, right?
Think about how a wheel works. If you are traveling at 10 mph, the part of your wheel that is in contact with the ground is moving at 0 mph (unless you are spinning the tires or skidding) that means the top of each wheel has to travel at 20 mph in order to get around the axle and make it back to the ground. So, the top half of each wheel on your vehicle (spokes, brake rotors, tire, rim, whatever) is traveling at a linear velocity that is anywhere between 1 and 2 times as fast as the bike is travelling as a whole.
So what part of the bike is being clocked by the radar gun? The operator controls that, not the equipment manufacturer.