Royal Enfield Rear Master Cylinder Major Kit for Interceptor 650, Continental GT 650 & Hunter 350 – 148714/B

Rebuild the serviceable internal section of a compatible rear brake master cylinder with this genuine Royal Enfield Major Kit. Part number 148714/B is the factory-numbered rear master-cylinder repair kit used on confirmed Interceptor 650, Continental GT 650 and Hunter 350 applications.

Safety-critical brake component: Fitment, diagnosis, assembly, brake-fluid handling and bleeding must be carried out by a trained motorcycle technician. This is a repair kit, not the complete rear master-cylinder assembly.

What This Product Is

• Genuine Royal Enfield rear master-cylinder major repair kit
• Exact part number / MPN: 148714/B
• Factory description: Major Kit Rear M/C
• Used to service the internal hydraulic operating components of the compatible rear master cylinder
• Supplied as one factory-packed repair kit

Key Features

• Genuine factory replacement kit
• Allows a serviceable rear master cylinder to be rebuilt without automatically replacing the complete assembly
• Intended to restore internal sealing and pressure generation when the master-cylinder bore and housing remain serviceable
• Exact kit identification prevents confusion with the minor kit, connector kit, push-rod kit and complete master cylinder
• Suitable for professional brake-system repair and restoration

Confirmed Compatibility

Model year, market and running production changes can affect brake components. The VIN-specific Royal Enfield parts catalogue remains the final fitment authority.

Not Automatically Compatible With

• Meteor 350, Classic 350 Reborn or Bullet 350 J-Series
• Classic 350/500 UCE, Bullet UCE or Thunderbird
• Himalayan 411, Scram 411, Himalayan 450 or Guerrilla 450
• Super Meteor 650, Shotgun 650, Bear 650 or Classic 650
• Front brake master cylinders
• Any aftermarket master cylinder or a cylinder with a different bore/internal design

Do not substitute part number 594689/A or another visually similar kit without exact catalogue confirmation.

What You Will Receive

1 × Genuine Royal Enfield Major Kit Rear Master Cylinder – 148714/B

The major kit services the internal piston and sealing arrangement of the applicable rear master cylinder. Exact loose-piece count and arrangement must be checked against the sealed factory package and the model-specific parts diagram before installation.

Not Included

• Complete rear master-cylinder housing/assembly
• Rear brake-fluid reservoir
• Reservoir hose or tube kit
• Connector kit
• Push rod or external boot unless included in the sealed major kit
• Rear brake hose, caliper or brake pads
• Brake fluid
• Bleeding equipment or installation labour

Related Rear Master-Cylinder Parts

When This Repair Kit May Be Required

• Brake fluid is leaking from the serviceable internal master-cylinder section
• Rear brake pressure is not maintained after the system has been correctly bled
• Rear brake pedal slowly sinks under steady pressure
• Internal piston movement is sticking because the service components are damaged
• Seals have been contaminated by incorrect fluid or poor servicing

A soft or ineffective rear brake can also be caused by air in the system, a leaking hose, caliper fault, worn pads, incorrect adjustment, ABS hydraulic problems or a damaged master-cylinder bore. Diagnose the complete brake system before ordering.

When the Complete Master Cylinder May Be Required

• Cylinder bore is scored, pitted, corroded or out of specification
• Master-cylinder body is cracked or physically damaged
• Mounting points or fluid ports are damaged
• Internal parts are seized and cannot be removed without damaging the bore
• Correct rebuilding and bleeding do not restore safe hydraulic pressure

Technical Details

Pre-Purchase Checklist

1. Confirm the required part number is exactly 148714/B, including suffix B.
2. Confirm the fault is inside the rear master cylinder.
3. Check whether you need the major kit, minor kit, push-rod kit, connector kit or complete cylinder.
4. Inspect the master-cylinder bore for scoring, pitting and corrosion.
5. Confirm the motorcycle's VIN-specific parts catalogue.
6. Compare the removed piston, seals, spring and retaining arrangement with the parts diagram.
7. Use only the brake-fluid type specified for the motorcycle.

Installation and Bleeding Notes

• Brake-system work must be performed by a trained technician.
• Work in a clean environment; dirt or fibres can prevent hydraulic seals from seating correctly.
• Protect painted, plastic and plated surfaces from brake fluid.
• Do not use petroleum grease, engine oil or mineral oil on brake seals.
• Inspect and measure the master-cylinder bore before installing the kit.
• Install every component in the direction and sequence specified by the workshop manual.
• Use only fresh brake fluid of the grade specified for the motorcycle.
• Bleed the complete rear brake circuit according to the model-specific ABS procedure.
• Check for leakage and ensure the pedal develops firm, repeatable pressure.
• Do not ride the motorcycle until braking operation has been professionally verified.

Important Return-Prevention Note

Hydraulic repair kits are precision and contamination-sensitive parts. Confirm the exact suffix, application and master-cylinder condition before opening the sealed package.

A correctly supplied kit is not eligible for return after opening, brake-fluid contact, installation, contamination, marking, damage or modification, subject to applicable law and the current store policy.

Record one continuous unboxing video showing the sealed parcel, shipping label, Royal Enfield label and complete contents. Report a wrong, missing or transit-damaged item within 24 hours with the video and original packaging.

Frequently Asked Questions

1. What is Royal Enfield part 148714/B?

It is the genuine major repair kit for the compatible rear brake master cylinder.

2. Is this the complete rear master cylinder?

No. It is an internal service kit, not the complete cylinder housing and reservoir assembly.

3. Is it for the front or rear brake?

It is for the rear brake master cylinder.

4. Does it fit Interceptor 650?

Yes, where the VIN-specific catalogue specifies 148714/B.

5. Does it fit Continental GT 650?

Yes, for the rear master-cylinder application specifying this exact part number.

6. Does it fit Hunter 350?

Yes, subject to exact part-number and VIN confirmation.

7. Does it fit Meteor 350 or Classic 350 Reborn?

No compatibility is claimed without a VIN catalogue specifying 148714/B.

8. Does it fit Himalayan or Scram 411?

Do not substitute it for 594689/A or another kit without exact confirmation.

9. What does “Major Kit Rear M/C” mean?

It is the major service kit for the internal operating and sealing section of the rear master cylinder.

10. What parts are included?

One factory-packed major kit is supplied. Verify the exact loose-piece count against the sealed package and parts diagram.

11. Is the brake-fluid reservoir included?

No. Rear reservoir assembly 148707/A is a separate part.

12. Is the connector kit included?

Connector kit 148715/B is separately identified and should not be assumed included.

13. Is the push-rod kit included?

Push-rod kit 148717/B is a separate reference unless physically included in the sealed major kit.

14. Is brake fluid included?

No. Use fresh brake fluid of the grade specified by the motorcycle manufacturer.

15. Will this fix every soft rear brake?

No. Air, hose, caliper, pad, ABS or bore problems can produce similar symptoms.

16. Can a scored master-cylinder bore be repaired with this kit?

Not safely by seals alone. A damaged bore can require complete master-cylinder replacement.

17. Can petroleum grease be used during assembly?

No. Petroleum products can damage brake-system seals.

18. Must the brake system be bled afterward?

Yes. The rear hydraulic circuit must be correctly filled and bled using the applicable ABS procedure.

19. Who should install this kit?

A trained motorcycle brake technician should perform the rebuild and safety checks.

20. What is required for a damage or shortage claim?

Provide a continuous unboxing video, shipping label, product photographs and original packaging within 24 hours.