Motorcycle Stator Wire Color Codes

Cheatsheet Content

General Stator Wiring Principles Stator wires typically connect to the Regulator/Rectifier (RR). Most common configurations: 3-Phase AC: 3 identical wires (often yellow or white) coming from the stator. Single-Phase AC: 2 wires from the stator, sometimes a third for ground or sensing. Color codes can vary significantly by model, year, and region, even within the same brand. Always consult the specific service manual for the most accurate information. Common wire colors for AC output from stator: Yellow (Y), White (W), Pink (P). Common wire colors for DC output from RR to battery: Red (R) or Red/White (R/W) for positive, Green (G) or Black (B) for negative. Brand-Specific Stator Wire Color Codes (Typical) Honda 3-Phase AC Output: Often three Yellow (Y) wires. Sometimes three White (W) wires. Single-Phase AC Output: Often a Yellow (Y) and a White (W) wire, or two Yellow (Y) wires. Ignition Power (from stator coil): Black/Red (B/R) or Red/Black (R/B). Suzuki 3-Phase AC Output: Typically three Yellow (Y) wires. Single-Phase AC Output: Often two Yellow (Y) wires, sometimes Yellow (Y) and White (W). Yamaha 3-Phase AC Output: Usually three White (W) wires. Sometimes three Yellow (Y) wires on older models. Single-Phase AC Output: Often one White (W) and one Red/White (R/W) wire, or two White (W) wires. Kawasaki 3-Phase AC Output: Commonly three White (W) wires. Sometimes three Yellow (Y) wires. Single-Phase AC Output: Often two White (W) wires. KTM 3-Phase AC Output: Frequently three Yellow (Y) wires. Single-Phase AC Output: Often two Yellow (Y) wires. Skygo (Philippines-based brand) Color codes can be less standardized and may follow common Asian market practices or specific OEM suppliers. Typical AC Output: Often three Yellow (Y) wires for 3-phase, or two Yellow (Y) or White (W) wires for single-phase. Always refer to the bike's specific wiring diagram. Motorstar (Philippines-based brand) Similar to Skygo, Motorstar models often use common Asian OEM components. Typical AC Output: Expect to see three Yellow (Y) wires for 3-phase systems. For single-phase, two Yellow (Y) or White (W) wires are common. As with all brands, the service manual is the definitive source. Important Considerations Always verify: The only reliable source is the motorcycle's specific service manual or wiring diagram. Regional Differences: Manufacturers may use different color codes for different markets. Aftermarket Parts: Aftermarket stators or regulator/rectifiers may use different color schemes. Testing: When in doubt, use a multimeter to test for AC voltage output from the stator wires and continuity to ground (if applicable).