Unfortunately ebikes seem surprisingly rare around here. Bikes/scooters over the 250W limit are even rarer and I've not seen anything suitable for sale secondhand at a reasonable price.
I did browse the For Sale section on here, but nothing available atm.
I'll keep and eye out for future upgrade parts.
Caliban, thanks for the reassurance
Do you happen to know if this is the disc I need?http://www.devi-motion.com/webshop/acce ... 160mm.html
It's the only one they sell, so I'd hope so.