Dr Pulley Sliders for GY6 150 Engines in Tao Tao Scooters
The best upgrade for your 150 scooters is the CVT roller weights which now become sliders at 18X14 which is the physical size of 18mm by 14mm with of a weight that matches your set up and riding conditions.
Combine these with a 1500rpm torque with a quality belt and feel your scooter come alive with the power to get to top speed quickly.