https://www.youtube.com/watch?v=6VR80pdELlo
Get ready for 8 minutes of hate watching, but, don't worry, you'll be rewarded with an amazing recovery at the end. Maybe just skip right to that.
It's like watching someone tune a Stradivarius.
The compilation video will cure any desires you have about getting a motorcycle to tour the English countryside, let alone London. Just stay out of the city; there are insane scooter drivers there, literally mentally disturbed.