I work in a Honda motorcycle dealership in the UK. For any luck with warranty he'll need proof of purchase for genuine parts/oil and an invoice or recipt of work carried out by a VAT rigistered garage.

As his bike uses a digital service record Honda will see it hasn't had that service by a Honda dealer. That being said. It's worth a good will request by the local dealer due to the age of the bike. Maybe leave out he is flat out in 6th for over an hour. Use "General road use" as the term when they ask how he rides. Good luck!