These high quality scooter parts are the performance valve spring set for 50cc, 125cc, and 150cc GY6 engines from NCY. The valve springs are made especially for the Genuine Buddy line of GY6 powered street legal motor scooters, and are rated to 11,000 RPMs.
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For comparison purposes, what r the stock valve springs rated at?
These performance parts can go on a variety of stock units with 50cc-150cc GY6 engines from NCY, so we are unsure what your unit would come with stock. The valve springs are made especially for the Genuine Buddy line of GY6 powered street legal motor scooters, and are rated to 11,000 RPMs.