Aikema web page doesn't have any of the more technical details of the hub, I'll try emailing them as well as yose power.It would be good if you could find the specifications for your gear reduction ratio and number of magnets for both P1 and P2.
I know a lot of people say P1 only affects the displayed speed and P2 should be set to 0. But when I set mine up properly I got a noticeable improvement in performance. In fact I now find PAS 5 way to high for normal running about and I use PAS 1 without the throttle now for normal cruising and I only switch to PAS 5 when I’m cycling on A roads and still don’t need the throttle.
Before changing P1 and P2 I was using PAS 5 and throttle all of the time.
I did a bit of digging about and there was a mention that the yose gear reduction is 4.3:1 with 20 magnets and that works out at 86 which you say gives an incorrect speed. But was your P2 set at 0?
161 seems to be a most peculiar number for such a small motor.
I tried setting P1 back to 86 and P2=0 and that resulted in a reported max speed of about 40 km/h but the actual speed was about the same as before with P1=86 which was about 20 km/h(ish)
I actually found a german forum where the akm 95rx was discussed in combination with the KT controller. They reached the same P1 value as me....perhaps this hub is just that bad...?