Which techniques/filters do improve sensation of speed on a motorcycle? Introduction
I have already searched for this topic, but sadly most of the time I just find articles about frame rate and/or shutter speed which doesn't reflect what I am looking for, really. This question is somewhat long, but I hope this doesn't bother anyone.
I started using a GoPro to film POV motorcycle shots using a chest mount in 4K, 60FPS, 1/120 shutter speed, Flat color profile, using ND8 filter for overcast and ND16 filter for sunny conditions. ISO is set to 100-400
For post production I use Final Cut Pro X
The filter reel has the following items in the exact order: White balance, Color board, Neat Video Reduce Noise v4, Sharpen, LUT and Vignette
The result of this looks like that:

                
            

Thoughts:

It seems like Neat Video is killing some of the road details which improve the speed sensation thing, but without the plugin, the footage would contain allot more noise, which I try to avoid.

At the moment the GoPro Hypersmooth seems to be the only image stabilization option available at the chosen resolution and frame rate. Not sure if there is a not so smooth alternative (plugin or setting) out there.

This video (the intro) here is fantastic as to show what I would gladly try to achieve: Example video



QUESTION:
What can I do while filming or post production to get a better sensation of speed without using Retime Editor? Please point me to helpful tutorials and plugins or simply give hints. Thanks!
I agree with my fellow German dude. Lowering the framerate (until 24) can increase the feeling of uncontrolled speed and momentum. If you already did that and didn't get the effect you were looking for, here's how you can use some trickery to fake it:

Motion blur! It helps selling the effect big time. I recommend using a radial blur which is going outwards from a defined point. Put this point in the center of the screen and use a feathered mask to cut the effect from the center, so the blur only effects the edges of the screen. This way, it appears as if the road is flashing by way faster than it actually did.
Also, when it comes to filming vehicles, it's surprisingly easy to get away with simply speeding up the footage. Don't overdo it obviously, but 125%-135% should look just fine.

Combining all these effects, lowering the frame-rate to 24/25, adding a radial blur towards the edges of the screen and speeding up the footage slightly should give you a convincing effect.