Genuine Royal Enfield Shotgun 650 / Classic 650 / Bullet 650 Rear Brake Master Cylinder – KAB00071/G

Genuine Royal Enfield rear brake master-cylinder assembly for compatible Shotgun 650, Classic 650 and Bullet 650 motorcycles. Part number KAB00071/G converts rear-brake pedal movement into hydraulic pressure for the rear braking circuit. This is a safety-critical hydraulic component and must be selected by the exact VIN and suffix. The earlier KAB00071/F reference is separately catalogued, so do not assume that /F and /G can be interchanged without current Royal Enfield supersession confirmation.

What It Is

• Genuine Royal Enfield rear brake master-cylinder assembly
• Exact manufacturer part number: KAB00071/G
• Hydraulic rear-brake pressure-generating component
• Confirmed application family: Shotgun 650, Classic 650 and Bullet 650
• Mounted within the rear foot-control/brake-pedal hydraulic system
• New replacement component for the correct VIN-specific brake specification

What It Is Not

• Not a front brake master cylinder
• Not a rear brake caliper
• Not an ABS modulator
• Not a complete rear brake system
• Not a reservoir, hose kit, pushrod kit or brake-pad set unless physically included
• Not confirmed for Super Meteor 650, Interceptor 650, Continental GT 650 or other models without exact catalogue verification

Product Highlights

• Exact bike names in title: Shotgun 650, Classic 650 and Bullet 650
• Exact SKU: KAB00071/G
• Correct brake position: rear master cylinder
• Suffix guidance: /G must be matched; /F is an earlier separately catalogued reference
• Buyer safeguards: VIN, mounting, pushrod, reservoir and hose-port checks included
• Professional repair guidance: correct brake-fluid handling, bleeding and ABS precautions covered

Verified Specifications

Confirmed Fitment

Model-platform similarity is not enough for brake-component selection. Confirm the VIN-specific parts catalogue, exact hose connection, mounting geometry, pushrod and reservoir arrangement.

Check Before Ordering

Not Confirmed / Not Compatible by This Listing

Related Brake Parts Comparison

Purpose and Diagnostic Guidance

The rear master cylinder uses piston movement from the brake pedal to build hydraulic pressure. Failure may present as internal bypass, fluid leakage, poor pressure generation, sticking piston action or damaged seals. A soft or ineffective pedal can also result from air in the system, old fluid, hose expansion, caliper faults, pad/disc problems, ABS hydraulic issues or incorrect pedal adjustment. Diagnose the complete system before replacing parts.

Box Contents

• 1 × Genuine Royal Enfield rear brake master-cylinder assembly, KAB00071/G

Not included unless physically packed: remote reservoir, reservoir cap/diaphragm, tube, clamps, brake hose, banjo bolts, sealing washers, pushrod/clevis parts, pedal hardware, ABS modulator, caliper, pads, brake fluid, bleeding equipment or labour.

Installation and Bleeding Guidance

1. Verify the VIN, exact KAB00071/G requirement and any official supersession notice.
2. Protect painted surfaces because brake fluid can damage paint.
3. Use only the brake-fluid specification stated in the motorcycle workshop manual.
4. Record reservoir tube, hose, pushrod, spacers and pedal linkage positions before removal.
5. Do not reuse sealing washers or locking hardware where the manual specifies replacement.
6. Install the master cylinder without twisting the hose or preloading the pushrod.
7. Set pedal height and master-cylinder free play to the official specification.
8. Fill and bleed the rear circuit using the prescribed sequence and suitable equipment.
9. If the ABS hydraulic circuit has been opened or air remains trapped, follow the Royal Enfield diagnostic/ABS bleeding procedure.
10. Perform a static pressure-hold test, inspect every joint for leakage and verify braking at controlled low speed before normal use.

This is a safety-critical hydraulic repair. Installation and final testing must be completed by a qualified motorcycle technician.

Care and Safety Guidance

• Never ride with a soft, sinking, leaking or ineffective brake pedal.
• Replace brake fluid at the interval and specification stated by Royal Enfield.
• Keep petroleum products, grease and dirt away from brake-fluid components.
• Use unopened clean brake fluid and do not return drained fluid to the container.
• After service, monitor fluid level, pedal feel, leaks and ABS warning indications.
• Do not disassemble a new master cylinder unless the official service procedure requires it.

Return-Prevention Checklist

• My motorcycle is a confirmed Shotgun 650, Classic 650 or Bullet 650 application.
• The VIN-specific catalogue calls for KAB00071/G.
• I need the rear master cylinder, not a front master cylinder or rear caliper.
• I checked the /G suffix and did not assume interchange with /F.
• I compared mounting, hose-port, pushrod and reservoir arrangements.
• A technician diagnosed the entire rear-brake system.
• I understand opened, fluid-filled, installed or marked brake parts are not returnable.
• I will record one uninterrupted unboxing video from sealed parcel through complete inspection.

Correctly supplied items are not returnable. Replacement is available only for a wrong or transit-damaged item, subject to an uninterrupted unboxing video and notification within 24 hours of delivery. Opened, installed, fluid-contaminated, bled, scratched, dismantled, altered or incomplete hydraulic brake parts cannot be returned.

Why Buy from Under The Hood?

• Shotgun 650, Classic 650 and Bullet 650 names included in the title
• Rear master cylinder clearly separated from caliper, hose and reservoir
• KAB00071/F versus KAB00071/G suffix warning included
• VIN and physical-comparison checks designed to reduce wrong orders
• Professional bleeding, ABS and safety guidance included
• GST invoice where applicable and domestic/international Royal Enfield parts support

Buyer Search Terms

Royal Enfield KAB00071/G, Shotgun 650 rear brake master cylinder, Classic 650 rear master cylinder, Bullet 650 rear brake pump, Royal Enfield 650 rear brake cylinder, KAB00071F replacement, genuine Royal Enfield hydraulic brake parts.

Frequently Asked Questions

1. What is KAB00071/G?

It is a genuine Royal Enfield rear brake master-cylinder assembly.

2. Which motorcycles are confirmed?

Shotgun 650, Classic 650 and Bullet 650 applications requiring this exact reference.

3. Is this a front master cylinder?

No. It is for the rear hydraulic brake circuit.

4. Is it the rear brake caliper?

No. The master cylinder generates pressure; the caliper applies the pads at the wheel.

5. Is KAB00071/F identical?

It is an earlier catalogued rear-master-cylinder revision. Interchange with /G must be verified through the VIN-specific catalogue.

6. Does it fit Super Meteor 650?

No fitment is claimed without exact official confirmation for the motorcycle's VIN.

7. Does it fit Interceptor 650 or Continental GT 650?

No fitment is claimed because their rear control and brake specifications may differ.

8. Is the reservoir included?

No reservoir inclusion is promised unless it is physically packed with the assembly.

9. Is the brake hose included?

No. Treat the rear master-cylinder hose as a separate component unless physically included.

10. Is brake fluid included?

No. Use only new fluid of the specification stated in the workshop manual.

11. Can a soft pedal prove the master cylinder is faulty?

No. Air, hose, caliper, fluid, ABS, pad, disc and linkage faults must also be checked.

12. Must sealing washers be replaced?

Replace them wherever the official workshop procedure specifies new sealing washers.

13. Does ABS require a special bleeding procedure?

It may if air enters the modulator or hydraulic circuit. Follow the model-specific service procedure.

14. Why is pedal free play important?

Incorrect free play can cause brake drag, poor pressure build-up or incomplete pressure release.

15. Can I install it without bleeding?

No. Opening the hydraulic circuit requires correct filling, bleeding and leak testing.

16. Is professional installation required?

Yes. This is a safety-critical brake component.

17. Can brake fluid damage paint?

Yes. Protect painted surfaces and clean any spill immediately according to the service instructions.

18. What must be checked before riding?

Pedal feel, pressure hold, fluid level, all joints, leaks, ABS warning status and controlled low-speed braking.

19. Can it be returned after fluid is added?

No. Fluid-filled, bled, installed or contaminated hydraulic components are not returnable.

20. How do I avoid ordering the wrong cylinder?

Match KAB00071/G, the motorcycle model, VIN, suffix, mounting, hose port, pushrod and reservoir layout.