Royal Enfield 570012/C – OEM Retainer Plate for Mainshaft Bearing (Crankcase LH) — Sold Individually

Maintain engine precision and prevent unwanted shaft play with the genuine Royal Enfield 570012/C Retainer Plate for Mainshaft Bearing. This factory-engineered component situates the mainshaft bearing flush inside the left crankcase housing, securing the bearing’s axial position and protecting the crankcase from thrust damage.

Over time, retainer plates may warp, crack, or lose tolerance due to bearing heat, vibration, or improper assembly. Replacing this critical part ensures smooth operation, correct bearing preload, and long-term engine reliability. It’s a standard component in RE’s crankcase assemblies and is required during engine rebuilds or crankcase repairs.

🔧 This listing offers either a single piece (1 pc) or a sealed 30-piece pack (ideal for workshops or batch servicing). Use the quantity selector to choose single or full-pack.

⚠️ Always match your existing retainer’s part code before purchasing — minor variants in thickness or flange fit can cause misalignment.

Key Features

• Genuine Royal Enfield OEM Part — 570012/C Retainer Plate

• Precisely machined to OEM tolerances for bearing axial alignment

• Helps prevent bearing movement and protects crankcase surfaces

• Drop-in replacement — no machining required

• Supplied single (1 pc) or in full pack of 30 pcs

• Durable RE-grade steel construction with OEM surface finish

• Critical for crankcase rebuilds, bearing replacement, and high-RPM stability

• Ideal for both repair shops and individual owners

Compatibility Table

Variants / Supply

• Part Number: 570012/C

• Type: Retainer Plate (Mainshaft Bearing)

• Side: LH (Crankcase Left side)

• Supplied: Single piece or sealed pack of 30 Pcs

Installation Notes

• Clean mating surfaces before installation

• Use correct torque specification for retainer bolts (as per service manual)

• Apply a thin coat of engine oil on the mating surface for friction control

• Ensure correct spacing if a shim or variant plate is used in your model

FAQs 

1. What is the purpose of the 570012/C retainer plate?
   → It locks the mainshaft bearing in place axially, preventing thrust motion and protecting the crankcase.

2. Is this part sold as a pack or individual?
   → You can purchase one piece (1 pc) or a full sealed pack of 30 pcs (ideal for workshops).

3. Will it fit my RE engine?
   → Fits most UCE / older RE crankcases using 570012-series retainers. Confirm part number and case design before ordering.

4. Can I reuse the old plate?
   → Only if it is perfectly flat and undamaged. Otherwise use new 570012/C for safety.

5. Is this secured by bolts?
   → Yes — use correct flange bolts to torque as per RE specification (avoid over-tightening).

6. Do I need new gaskets or O-rings?
   → N. Just ensure mating surfaces are clean. Use thread locker if specified.

7. Will the wrong retainer plate damage my engine?
   → Yes. Even small misalignment or the wrong variant can lead to bearing wear, crankcase scoring, or failure.

8. Can I use 570012/C for J-Series engines?
   → This part is documented in UCE / pre-EFI crankcase lists; J-Series engines often use different designs. Verify your model’s crankcase before assuming.

9. How to confirm I have the right variant?
   → Check your current retainer’s marking (e.g. C suffix) and dimensions (thickness, flange diameter) before ordering.

10. What torque should I use when installing?
    → Use the official RE service manual specs for retainer plate bolt torque — overtorque can distort the plate.