NCY Performance AC CDI, GY6 (139QMB) No Rev Limiter

NCY Performance AC CDI, GY6 (139QMB), No Rev Limiter

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:

This CDI works with scooters like the Lance Cali Classic, Havana Classic, Lance PCH, and Lance Cabo!

****NOTE: There are no returns on electrical parts. Please compare photos and part numbers before purchasing for quality and fitment on your scooter. It is always recommended to hire a professional mechanic for installation.

Questions about parts & compatibility? Visit the contact page. - HB SCOOTERS PARTS - Professional Scooter Dealership in Southern California Since 2008