Royal Enfield Fuel Pump Lock Plate / Retainer Ring | Bullet, Classic, Meteor, Hunter 350 | 1100402/C | Genuine OEM

The Royal Enfield 1100402/C Lock Plate (Fuel Pump Lock Plate / Retainer Ring) is the OEM locking ring that secures the fuel pump module to the fuel tank. If your lock plate is rusted, bent, has damaged tabs, or no longer clamps the pump evenly, it can lead to poor sealing, pump movement, fuel smell/leak risk, or repeated gasket failures. This is a genuine RE part used on J-platform 350 models (as listed in UK/Euro V parts catalogues). 

This is the correct replacement when:

• A mechanic over-tightened and cracked/warped the ring

• Tabs are rounded off and the ring won’t “bite” properly

• You’re doing a preventive refresh during a fuel pump service

For best results, replace/inspect the fuel pump seal/gasket at the same time (commonly listed as 1100401/C) and torque evenly to avoid distortion.

Key Features 

• Genuine Royal Enfield OEM Lock Plate for fuel pump mounting

• Part Number: 1100402/C (also referred as Fuel Pump Lock Plate / Retainer Ring) 

• Restores correct clamping pressure to help prevent pump movement & sealing issues

• Ideal fix for rusted, bent, damaged-tab lock plates

• Recommended during fuel pump service/replacement to reduce comebacks

• Direct-fit OEM profile—no modification required (when matched to correct model)

• Works with the fuel tank/fuel pump assembly locking system (Fuel Tank parts group) 

Compatibility Table (models, engine type, BS stage, years)

Fitment Note (India/BS6): Dealer catalogues above are explicitly UK/Euro V. Many BS6 Indian-market J-Series bikes share the same fuel pump locking system, but to keep returns near-zero, verify by VIN/microfiche or match your existing lock plate number before ordering. 

Variants

• Single unit (1 lock plate)

• No official LH/RH / color variants indicated in dealer catalog listings for this part number. 

FAQs 

Q1. What does 1100402/C do?
It’s the fuel pump lock plate that clamps/locks the pump module to the fuel tank. 

Q2. Should I replace the gasket/seal too?
Yes—highly recommended. If the seal is old/hardened, leaks can persist even with a new lock plate. (Common paired seal: 1100401/C).

Q3. Symptoms of a bad lock plate?
Loose pump seating, uneven clamping, fuel smell, repeated gasket seepage, damaged/rusted tabs that won’t tighten properly.

Q4. Is this for Classic 350 old UCE (carb/EFI) models?
No—this part is listed for J-platform / Euro V model families in the sources above. If you have an older UCE Classic/Bullet, confirm your fuel pump mounting style first. 

Q5. Can I reuse my old lock plate after opening the fuel pump?
Only if it’s perfectly intact (no rust swelling, no bent ring, no tab damage). If in doubt, replace to avoid repeat labour.