Product Description
The 0202SQ Wiring Harness serves as the central electrical backbone for the late-model Thunderbird 350 UCE platform. Unlike older versions, the BS4-specific harness includes dedicated connectors for the purge valve (EVAP system) and updated pin-outs for the instrument cluster and lighting.
Constructed from high-conductivity copper with heavy-duty thermal insulation, this harness is built to endure the heat generated by the 350cc engine while resisting the vibrations inherent in the Thunderbird chassis. Each coupler is precision-molded to ensure a secure, waterproof fit, making it an ideal replacement for motorcycles experiencing intermittent starting issues, sensor failures, or melted wiring due to aging.
Key Features:
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BS4-Ready Design: Includes all necessary wiring for the BS4 emission sensors and the AHO lighting system.
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OEM Standard Insulation: Features high-grade PVC and fire-retardant sleeving to prevent short circuits and brittleness from engine heat.
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Corrosion-Resistant Terminals: Multi-pin couplers are treated to prevent “green crust” oxidation, ensuring stable voltage to the TCI/ECU.
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Direct Plug-and-Play: Designed to match the factory routing and mounting points; no wire cutting or splicing required.
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Reinforced Battery Leads: Features heavy-gauge cables for the battery and starter relay to ensure reliable cold starts.
Technical Specifications:
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Part Number: 0202SQ
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Brand: Swiss (Premium Automotive Electricals)
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Application: Main Electrical Cable Assembly
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Emission Standard: BS4 (BS-IV)
Vehicle Compatibility:
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Royal Enfield Thunderbird 350 BS4 (2017–2020)
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Royal Enfield Thunderbird 350X BS4 (Non-ABS variants)
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Note: For models equipped with ABS, please refer to Part No. RAC00032/C, as the ABS modulator requires a specialized shielded sub-loom not included in this standard harness.













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