Part No. 570047/E
Part Details
- Part Name: Auto Primary Chain Tensioner Assembly / Auto Chain Tensioner Assembly.
- Function: It uses a spring-loaded plunger (the toothed part visible in the image) to automatically apply tension to the primary chain, reducing chain slack, noise, vibration, and preventing premature wear of the chain and sprockets.
- Genuine Part Number: The widely recognized genuine Royal Enfield part number for this assembly is:
570047/E
🏍️ Compatibility (UCE Models)
This assembly is specifically designed for the older generation of Royal Enfield motorcycles that use the UCE (Unit Construction Engine) platform.
It is compatible with the following models:
- Royal Enfield Classic 350/500 (BS3 and BS4 models)
- Royal Enfield Standard/Bullet 350/500 (UCE models)
- Royal Enfield Electra 350/500 (UCE models)
- Royal Enfield Thunderbird 350/500 (UCE models)












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