The regulator/rectifier converts alternating current (AC) from the flywheel into direct current (DC) to charge the battery. With the engine running at 5,000 RPM, check the voltage across the battery terminals. It should register between 14.0V and 14.5V. If it reads below 13.0V or climbs above 15.0V, your regulator/rectifier needs to be replaced to prevent battery damage. 4. Chassis, Suspension, and Brakes

A comprehensive manual is divided into sections covering every part of the scooter. 1. General Information

Disconnect the fuel line, vacuum line, and auto-choke (bystarter) electrical connector.

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What is your Kymco KB 50 currently showing? (e.g., won't start, loss of top speed, bogging down)

Once you have your service manual in hand, here are the three most common procedures you will likely perform yourself.