Royal Enfield 570047/E – Auto Primary Chain Tensioner Assembly (Genuine OEM)

Ensure smooth power delivery and reduce drivetrain wear with the Royal Enfield 570047/E Auto Primary Chain Tensioner Assembly. This genuine Royal Enfield component is responsible for maintaining optimal tension on the primary chain that connects the crankshaft to the clutch assembly in UCE engine models.

By automatically adjusting chain slack over time, it helps reduce vibration, noise, and premature wear — making it a key component for long-term engine health.

🔧 Key Features:

• Genuine Royal Enfield part number: 570047/E

• Maintains consistent tension on the primary drive chain

• Auto-adjusting spring-loaded mechanism for reduced maintenance

• Prevents chain slippage and abnormal noise from the primary case

• Improves clutch engagement and smoothness during gear shifts

✅ Compatibility:

• Classic 350 (UCE) – BS3 & BS4 models

• Classic 500 (UCE)

• Bullet 350 UCE

• Bullet 500 UCE

• Electra 350 (UCE)

❌ Not compatible with J-series bikes like Classic Reborn, Meteor 350, Hunter 350, or Himalayan/650cc series

📦 Package Includes:

• 1 x Auto Primary Chain Tensioner Assembly (Pre-fitted with spring and plunger)

• Factory-sealed original RE packaging

❓ Frequently Asked Questions:

Q1. What does the primary chain tensioner do?
It maintains correct tension in the primary chain that links the crankshaft to the clutch, ensuring smooth power transfer.

Q2. When should I replace this part?
If you hear rattling or knocking sounds from the clutch side, or feel inconsistent clutch engagement, it may be time to replace the tensioner.

Q3. Is it compatible with the new Reborn or Meteor 350?
No. Those bikes use a J-series engine and a different drivetrain layout.

Q4. Is this an automatic or manual tensioner?
This is an automatic tensioner with a spring mechanism that adjusts slack on its own.

Q5. Is it an original RE part?
Yes, this is a genuine OEM Royal Enfield part used in factory builds.