MOREV 5-Pin AC CDI Ignition Module for 50–125cc ATVs & Dirt Bikes — 5-Pin Rectangular Connector, Horizontal 4-Stroke

MOREV 5-pin AC CDI ignition module is a direct replacement ignition unit engineered for compatible 50cc–125cc horizontal 4-stroke ATVs, dirt bikes, pit bikes and go-karts that use a 5-pin AC-fired system.

When an aging CDI fails, it can leave your powersport vehicle unable to spark or run reliably. This MOREV AC CDI is built to match common 5-pin rectangular connectors used across many small horizontal 4-stroke engines. Before ordering, confirm the original part’s ignition type, connector shape and wiring layout — engine displacement or model name alone do not guarantee fit. The unit works only with AC-fired systems, not DC CDI units or 6-pin GY6-style connectors.

How do I confirm this CDI will fit my ATV or dirt bike?

Fit depends on the ignition type and connector, not simply the vehicle brand or displacement. Inspect the original module: verify it’s an AC-fired CDI with a rectangular 5-pin male connector and compare terminal positions and module dimensions.

• Match the 5-pin connector shape and pin layout to the MOREV module.
• Check that your engine is a horizontal 4-stroke with AC ignition.
• Compare physical mounting points and overall module size.
• Do not attempt to use with 6-pin GY6 or DC CDI systems.

What vehicles and models is this module commonly used with?

The MOREV CDI is compatible with a range of popular entry-level powersports machines that share the same AC 5-pin ignition footprint. It’s often used as a replacement for specific Coolster, TaoTao, SSR, Apollo and other budget-friendly brands equipped with horizontal 4-stroke engines.

• Coolster: 3125B, 3125R, 3125XR8, 3050C.
• TaoTao: Boulder B1, Cheetah, TForce, New TForce, DB17, DB14.
• SSR: SR70, SR110, SR125; Apollo RFZ, X18, X4, X19.
• Also fits select Kayo, Baja, Roketa, Kazuma, SunL and Jetmoto models with matching connector.

What are the key installation and compatibility cautions?

Installation is straightforward for mechanically minded users, but wiring differences can cause damage if mismatched. Always power off the vehicle and consult wiring diagrams or a mechanic if you’re unsure; an incorrect connector or ignition type will not function and may harm electronics.

• Turn off battery/disconnect power before replacing the CDI.
• Confirm pin-to-pin wiring matches the original module exactly.
• Avoid forcing connectors or modifying pins to fit; that indicates incompatibility.
• If uncertain, seek professional fitment or confirmation from a parts diagram.

What performance or functional differences should I expect from this replacement?

This MOREV unit restores ignition control to an AC-fired system and should return your engine to normal starting and running behavior when fitted correctly. It is a functional replacement rather than a tuning part — expect stock-equivalent timing characteristics unless specified otherwise.

• Designed to match stock ignition timing for compatible engines.
• Restores spark control for engines with a failed CDI.
• Not intended as a performance or rev-limiter modification.
• Durability depends on installation environment and heat/vibration exposure.

Who is this for: The MOREV 5-pin AC CDI ignition module is aimed at owners, mechanics and small-vehicle shops maintaining entry-level ATVs, dirt bikes, pit bikes and go-karts that use a horizontal 4-stroke AC ignition with a rectangular 5-pin connector. It’s suited for anyone needing an economical functional replacement—provided they verify connector type and wiring before purchase.