I thought your grandma had bought a scooter.

I googled Nan engines. I thought it was like a Lifan.

I've checked back to the Piaggio Beverly handbook because I didn't remember having to be so careful with revs. The advice there was:
DURING THE FIRST 1000 KM. DO NOT RIDE THE VEHICLE OVER 80% OF ITS MAX. SPEED. AVOID OPENING THE THROTTLE GRIP COMPLETELY OR KEEPING A CONSTANT SPEED ALONG LONG SECTIONS OF ROAD. AFTER THE FIRST 1000 KM. INCREASE SPEED PROGRESSIVELY, IF POSSIBLE, UNTIL THE MAXIMUM PERFORMANCE IS OBTAINED.
The Beverly would easily go 80mph, so that gave you quite a bit of leeway. I gave it in part exchange for the Burgman and after 4 years and 18500 miles the engine was still brilliant.

smeghead wrote:I thought your grandma had bought a scooter.

Doh! I can only appeal to the administrator to edit the title before we get any more granny humour.

I owned a new Burgman 400 in 2012. Running in is a pain, but you can actually exceed 4k revs as long as you vary the throttle like the guys are saying. But Suzuki GB said don't go over 5k revs. Now that's ok because it kicks itself into high gear and you can tootle along at 50-55mph at 5k rpm on the flat. The reason they say not to exceed 5k revs is because of the Nikasil coating in the cylinder bore, it's very soft from new and it has a rough plato honing so lots of damage can be done if you rag the engine too much in the first 500 miles. But you have to go some to do that, so don't worry if you've already been over 5k but just don't do it too often. Don't overthink the run in process, it'll be fine.