3-Pin MG641295-4 / 7283-8732-40 Waterproof 1.2mm Female Connector – Motorcycle Harness

Direct-fit replacement for Yazaki part numbers MG641295-4 and 7283-8732-40, a 3-pin waterproof 1.2mm pitch female connector from the Yazaki 1.2mm series. This ultra-compact connector is widely used in Japanese motorcycle and scooter harnesses for sensor and signal circuits requiring IP68 protection in a minimal footprint.

Key Specifications

• Part Numbers: MG641295-4 / 7283-8732-40 (cross-reference)
• Pin Count: 3
• Gender: Female (with wire)
• Terminal Pitch: 1.2mm
• Wire Gauge: 22 AWG (0.3 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 3A per pin (signal circuits)

Applications

• Japanese motorcycle throttle position sensor (TPS) harness
• Scooter ECU signal input connectors
• Coolant temperature sensor wiring on small-displacement engines
• ABS wheel speed sensor connectors (Honda, Yamaha, Kawasaki, Suzuki)
• Instrument cluster signal wiring

Yazaki 1.2mm Series – Technical Notes

The 1.2mm pitch Yazaki series is one of the most compact waterproof connector families in Japanese OEM harnesses. Key handling requirements:

• Precision crimping mandatory: Use a micro-crimper rated for 0.3mm² (22 AWG) – Engineer PA-09 or Hozan P-706 micro version. Standard crimpers will crush the 1.2mm terminal barrel.
• Wire seal integrity: The rubber wire seal must be correctly seated around the 22 AWG insulation. Using 20 AWG or larger wire will prevent the seal from compressing correctly, compromising IP68 rating.
• Terminal insertion force: 1.2mm terminals require careful alignment – insert straight and feel for the audible click of the terminal lock engaging.

Frequently Asked Questions

Q: Are MG641295-4 and 7283-8732-40 the same connector?
A: Yes. MG641295-4 is the Yazaki internal part number; 7283-8732-40 is the OEM cross-reference number used in vehicle service manuals. Both refer to the identical 3-pin 1.2mm waterproof female housing.

Q: What is the mating male connector?
A: The mating male housing in the Yazaki 1.2mm series is MG641294-4 (3-pin male). Verify the male housing part number on your vehicle harness before ordering.

Q: Can this connector be used for ABS sensor wiring?
A: Yes. The 1.2mm Yazaki series is used for ABS wheel speed sensor connectors on Honda, Yamaha, Kawasaki, and Suzuki motorcycles. The IP68 rating ensures reliable operation in wet underbody conditions.

Package Contents

1 × 3-Pin Female Connector (MG641295-4 / 7283-8732-40) with 22 AWG wire, rubber wire seals, and terminal insert