Just got the Honda Grom back from its 6,400 km (4,000 mi) service. Maybe I'm just imagining it, but it feels like new again now.
It'd probably benefit from being serviced more frequently - it's only got 9 HP, so you have to ride it pretty hard to actually get anywhere. I'll try changing the oil at the next 3,200 km instead of waiting another 6,400.
Hard to believe I've had this bike for 13 months now. It's a 10/10 bike, but I'll really need to upgrade soon.