The Royal Enfield 1040232/A Main Wiring Harness is the complete main cable/wiring loom used in the electrical system of the Royal Enfield Thunderbird 350 BS4.
Royal Enfield parts data identifies 1040232/A as “HARNESS, MAIN CABLE.” Parts fitment information confirms its application to the Thunderbird 350 BSIV, with the same part also listed for the Thunderbird X 350 BS4.
The main harness connects the motorcycle’s major electrical circuits and components, including the ignition, lighting, switches, charging system, instrument cluster and other electrical connections. It is suitable for replacement when the original wiring loom is damaged, burnt, cut, corroded or has been improperly modified.
Key Features
- Genuine Royal Enfield spare part
- Part Number: 1040232/A
- Description: Harness, Main Cable
- Complete main wiring harness
- Designed for Thunderbird 350 BS4 / BSIV
- OEM-specification wiring loom
- Original-style connectors and routing
- Suitable for electrical system replacement
- Ideal for accident repair and wiring restoration
- Factory-style fitment
Compatibility
- Royal Enfield Thunderbird 350 BS4 / BSIV
- Royal Enfield Thunderbird X 350 BS4 / BSIV
- 346cc UCE platform
- Part Number: 1040232/A
The strongest catalogue evidence confirms Thunderbird 350 BSIV fitment; Thunderbird X 350 BS4 is also listed by current parts sources.
Important: This harness should not be assumed to fit Thunderbird 500, Thunderbird 350 BS3 or other Royal Enfield models. Match the existing part number, connectors and motorcycle BS specification before ordering.
Application
Royal Enfield Thunderbird 350 BS4 / BSIV – Complete Main Electrical Wiring Harness
Package Includes
- 1 × Main Wiring Harness / Main Cable
- Part No. 1040232/A
Note: Battery, ECU, switches, relays, fuse box and other electrical components are not included unless specifically mentioned.










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