I'm not familiar with US traffic violation laws, but was quite familiar with the system in UK and how to avoid prosecution & more so in Japan now
As there was no video footage, he was going the other way and no other officer in the car, he had no proof unless you'd admit it. When asked what speed you thought you were doing, did you admit to being over the limit?
If asked in future, a good response would be to say is, "as it's a winding road I was watching what was ahead and not concentrating on reading the numbers on my speedometer".
Besides, when he pulled you up you weren't even on the bike and gloves / helmet removed. What proof did he have it was you?
You could probably contest the fine & points and likely win, unless you signed something to say you'd agreed you'd been speeding at 70 mph.
...He's probably hoping you'll just pay it and not contest.... hence reducing the speed.
Police don't usually like to go to court for something which isn't water tight. If they don't turn up, your fine is overturned automatically.
If they have nothing on you, you could ask for proof, calibration certificate for the radar detector and proof he caught you going above the limit the other way (Video fellow officer, etc) as you feel you weren't over the limit. You should also be able to see the evidence they intend to present prior to the court hearing. That is - if you can be bothered to take a day off work to contest it.
I'd have been gone, dissappeared, nada, niente... bye bye Mr. Policeman.
Just a figment of his imagination. Your friend would probably have been behind him anyways, as he did a U turn shortly after seeing you / he'd have seen the cop and slowed down himself anyways.
Feel sorry for you, but you can probably get off this if you want to.
In the event they cannot prove it, then they can't pin it on you. Simple as that.
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