RX 135 ECU CDI

The CDI (Capacitor Discharge Ignition) or ECU unit is the "brain" of your Yamaha RX 135’s electrical system. It controls exactly when the spark plug fires relative to the piston's position. Over time, stock CDI units can become "tired," leading to weak sparks, misfires at high RPMs, or difficult cold starts. This RX 135 ECU/CDI is engineered to provide a stable, high-intensity spark map, ensuring your 2-stroke legend screams to the redline with absolute consistency.

Why the RX 135 CDI Unit is a Critical Component:
Optimized Ignition Mapping: Specifically programmed for the port timing of the Yamaha RX 135 (4-speed and 5-speed variants), providing a crisp throttle response and a smoother powerband.

High-RPM Stability: Unlike generic ignition coils, this unit is built to handle the rapid-fire requirements of a high-revving 2-stroke engine without "dropping" sparks or hitting an artificial ceiling.

Weather-Sealed Durability: Encased in a high-grade, vibration-resistant resin housing that protects the delicate internal circuitry from the heat, moisture, and oil common in a 2-stroke engine bay.

Easy Plug-and-Play Setup: Designed with the standard RX 135 wiring harness connectors. No cutting or splicing is required—just plug it in and feel the immediate improvement in starting and idling.

Restoration Essential: If you are experiencing "missing" at high speeds or a bike that simply won't start despite having fuel, a failing CDI is often the culprit. This unit restores factory reliability in minutes.