Hi my nephew has a sym 50 an it won’t go any faster than 23 mph an quite dangerous when cars are overtaking him does anyone know how to make it faster thanks ?

Dom, October 2022

There's several specialist forums that'd be a better place to ask, as they offer specialist and enthusiast support. Here's a couple. More out there.

https://itistheride.boards.net/thread/2097/loss-50cc-scooter-slow

https://www.scootershack.co.uk/threads/removed-washer-but-speed-decrease.30555/

Ddhf, October 2022