NCY High Performance Billet CDI (AC POWERED) GY6

Unlock your engine's full potential with the NCY Performance CDI. Designed specifically for 139QMB and GY6-based 50cc–170cc scooters, this high-output ignition module replaces your restrictive factory CDI with a more aggressive ignition curve and, most importantly, removes the factory rev limiter — allowing your engine to reach higher RPMs and sustain power through the top of the rev range.

Housed in a rugged orange billet aluminum casing, the housing doubles as a heat sink to protect the internal transformer, which boosts system voltage to 400–600 volts for a hotter spark and more efficient combustion.

Key Performance Benefits
Rev Limiter Removed: Eliminates the electronic RPM ceiling found on stock units
Aggressive Timing Map: Retuned ignition curve for improved acceleration and throttle response
High-Voltage Output: 400–600V transformer boosts spark intensity for reliable ignition
Billet Aluminum Housing: Protects sensitive electronics from road vibration and heat
Compatibility
This is a 6-Pin (2+4) AC Ignition module compatible with most Chinese-manufactured GY6 engines: