Racing CDI 5-Pin AC for 50cc-125cc Horizontal Engine Chinese ATV & Dirt Bike

GOOFIT Modified 5-Pin AC Racing CDI – Unlimited Performance Series

Break through the factory speed ceiling. The GOOFIT Modified 5-Pin AC Racing CDI is a high-output ignition module engineered specifically for the Chinese 4-stroke horizontal engine platform. Standard factory CDIs are often designed to restrict your engine’s RPM, preventing you from reaching top-end speeds. This modified unit eliminates that rev-limit entirely, allowing your motor to rev freely to its physical maximum.

By resetting the ignition advance curve, this CDI fires the spark earlier in the compression stroke, resulting in sharper throttle response and significantly more aggressive acceleration. Whether you are racing on a dirt track or climbing trails, this module provides the competitive edge needed for high-performance riding.

Product Compatibility

This 5-pin unit is a direct "Plug-and-Play" racing upgrade for:

• Engine Type: 50cc, 70cc, 90cc, 110cc, 125cc, 140cc, 150cc, and 160cc Horizontal Engines (Cylinder points forward).
• Vehicle Types: Pit Bikes, Dirt Bikes, ATVs, Quads, Go Karts, and Scooters.
• Compatibility: Fits most Chinese brands including TaoTao, SSR, Coolster, Buyang, Roketa, and more.
• Important Note: Designed for AC (Alternating Current) systems. Not for GY6 or vertical engines.

Key Technical Specifications:

• Connector: 5-Pin Male, Single Plug configuration.
• Current Type: AC Fired (Magneto-driven).
• Performance Tuning: Zero Rev-Limit / Unlimited RPM profile.
• Feature: Remapped Ignition Advance Curve for faster acceleration.

Why Choose the GOOFIT Modified Racing CDI?

• Unlock Higher Top Speeds: By removing the internal governor, your engine can pull harder through the high-RPM range, increasing your vehicle's overall velocity.
• Improved Low-End Snap: The optimized timing advance provides an immediate boost in torque during take-off, helping you clear jumps or power out of corners with ease.
• Stabilized Spark Delivery: Engineered for high-vibration racing environments, ensuring a consistent electrical discharge that won't "break up" at high speeds.
• Hassle-Free Installation: No wiring modifications required. Simply unplug your restricted stock CDI and snap in the GOOFIT Racing module for an instant performance gain.