YAMAHA Crux Bike Old Model CDI Unit

Yamaha Crux Bike Old Model CDI Unit

The Yamaha Crux Bike Old Model CDI Unit is an OEM-standard replacement electronic ignition control box built specifically for Yamaha Crux (Old Model) motorcycles. Functioning as the central intelligence of your two-wheeler ignition circuit, this unit receives micro-second timing pulse signals from the stator pickup coil, instantly computes engine RPM advance, and discharges stored electrical energy to the high-tension ignition coil to generate hot, consistent sparks across all riding conditions. Explore our complete selection of motorcycle electronic control units in the Bike CDI Unit category.

Compatibility

• Target Model Platform: Yamaha Crux (Old Model)
• Brand Architecture: Genuine Yamaha compatible electronic ignition system
• Terminal Coupler Format: OEM standard coupler molded factory wiring connector
• Ignition Type: High-energy digital advance capacitor discharge ignition
• Operating Voltage: 12V automotive electrical standard
• Negative Match Warning: Does NOT fit Yamaha Crux R, Yamaha Libero, or models converted to incompatible racing CDI harnesses, inverted pin blocks, or mismatched AC/DC generator setups.

Specifications

What’s Included

• 1x Electronic CDI Ignition Control Unit: Pre-programmed factory timing module.
• 1x Integrated Terminal Socket Block: Pre-molded factory connector interface.
• Heavy-Duty Shockproof Packaging: Sealed moisture-barrier packaging for safe shipping.
• Note: Frame rubber mounting sleeve, ignition coil, spark plug, and main chassis wiring harness are not included and should be inspected on your motorcycle.

Installation & Electrical Diagnostic Tips

To ensure flawless engine starting, prevent misfiring, and protect your replacement CDI unit from electrical spikes, follow these four mechanic-approved workshop procedures:

1. Verify Charging Voltage & Battery Health: Before connecting the new Yamaha Crux Bike Old Model CDI Unit, measure your motorcycle battery and regulator-rectifier voltage using a digital multimeter. A faulty voltage regulator exceeding 15.0V will instantly fry internal CDI capacitors. Ensure charging voltage remains strictly between 13.8V and 14.5V across all RPM ranges.
2. Inspect Pickup Coil Trigger Pulse: Connect multimeter test probes to the pulser coil leads coming from the stator magneto. Confirm resistance falls within factory specifications (typically 120Ω to 350Ω). A damaged pickup sensor or loose air gap will cause erratic ignition timing that resembles a CDI failure.
3. Ground & Kill Switch Continuity Check: Inspect the primary frame ground connection and the engine kill switch circuit. Corroded ground terminals create high electrical resistance that prevents full capacitor charging, resulting in weak yellow sparks instead of crisp blue sparks.
4. Clean Coupler Terminals & Secure Mounting: Spray electrical contact cleaner into the motorcycle harness socket prior to insertion. Firmly press the connector until the retention clip snaps into position. Always re-seat the CDI module into its rubber frame sleeve to insulate delicate solid-state electronics from high engine vibrations.

Frequently Asked Questions

Is this Yamaha Crux Bike Old Model CDI Unit an exact fit for Yamaha Crux?

Yes. This ignition module is precision-engineered to match the exact factory ignition advance curve, socket keying, and terminal pinouts for the Yamaha Crux Old Model.

What are the common symptoms of a failing Yamaha Crux CDI unit?

Common failure symptoms include sudden engine stalling when warm, high-RPM misfiring, backfiring through the exhaust, hard starting, or complete absence of spark at the spark plug despite a working battery and ignition coil.

What type of connector coupler does this CDI unit use?

It utilizes an OEM-standard factory coupler interface designed for direct plug-and-play installation into the original factory wiring harness without wire cutting or splicing.

Is this CDI module waterproof and vibration resistant?

Yes. The entire internal printed circuit board and high-voltage capacitor assembly are fully vacuum-encapsulated in solid epoxy potting resin, guarding against water ingress, monsoon moisture, and engine vibration.

What is included in the package?

The package includes 1x brand-new, factory bench-tested Yamaha Crux Bike Old Model CDI Unit in protective shockproof double-box packaging.

Do you offer free shipping?

Yes. Free shipping across India.

Shipping

All motorcycle electrical spare parts are dispatched within 2–3 business days via premier express courier partners. Delivery typically takes 5–7 business days across all states and pin codes in India. Every CDI unit is individually bench-tested, moisture-sealed, and packaged in double-corrugated protective boxes to guarantee perfect condition upon arrival. View our Full Shipping Policy.

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