Royal Enfield Interceptor 650 & Continental GT 650 Rear Master Cylinder Connector Kit – 148715/B

Repair the fluid-feed connection at the rear brake master cylinder on the applicable Royal Enfield Interceptor 650 or Continental GT 650 with this genuine connector kit. Exact part number: 148715/B.

This kit is used where the remote rear brake-fluid reservoir tube joins the rear master cylinder. It is a small but safety-critical hydraulic-brake component: a damaged connector or failed seal can allow brake fluid to escape and air to enter the rear brake system.

Important: This is the rear master-cylinder connector kit. It is not the reservoir tube, remote reservoir, ABS brake hose, master-cylinder rebuild kit, complete master cylinder or rear caliper.

What This Product Is

• Genuine Royal Enfield connector kit for the rear brake master cylinder
• Exact listing SKU and manufacturer part number: 148715/B
• Catalogue description: Connector Kit, Rear M/C
• Installation point: reservoir-fluid inlet connection at the rear master cylinder
• Application: Royal Enfield 650 Twin rear hydraulic-brake system
• Quantity supplied: one manufacturer-packed connector kit

What This Product Is Not

• Not reservoir tube kit 148718/B
• Not rear brake reservoir assembly 148707/A
• Not rear master-cylinder minor kit 148713/B
• Not rear master-cylinder major kit 148714/B
• Not master-cylinder boot / pushrod service part 148717/B
• Not the complete rear master cylinder
• Not the hydraulic hose from the master cylinder to the ABS modulator
• Not the ABS-modulator-to-caliper hose or a rear-caliper part

Key Features

• Factory-reference replacement for the connector at the rear master-cylinder reservoir inlet
• Correct exact SKU retained for dependable parts-counter and workshop matching
• Designed for the applicable Interceptor 650 and Continental GT 650 rear master-cylinder layout
• Restores the connection point when the original connector is damaged, leaking or disturbed during service
• Helps maintain a sealed gravity-feed path from the remote reservoir to the rear master cylinder when correctly installed
• Separately identifiable from the tube, reservoir, rebuild kits and pressure-side brake hoses

Confirmed Product Details

Confirmed Compatibility

Some earlier Twin 650 parts literature may show revision 148715/A, while this listing supplies exact part 148715/B. Do not choose only by registration year. Confirm the removed connector, rear master-cylinder design and required part number before opening the package, especially if the brake assembly has previously been replaced.

Fitment Not Confirmed—Do Not Assume

• Royal Enfield Super Meteor 650
• Royal Enfield Shotgun 650
• Royal Enfield Bear 650
• Royal Enfield Classic 650
• Royal Enfield Himalayan 650 or any future 650 model
• Classic, Bullet, Electra, Meteor, Hunter, Himalayan, Scram or Guerrilla ranges
• Any motorcycle requiring a connector with a different shape, seal, inlet angle or tube interface

Engine capacity alone does not confirm this part. If your motorcycle is not an Interceptor 650 or Continental GT 650, obtain model-specific parts-book confirmation before ordering.

Closely Related Parts—Order the Correct Item

What the Connector Kit Does

The rear brake reservoir is mounted remotely from the master cylinder. A feed tube carries brake fluid from that reservoir to the master-cylinder inlet, and this connector kit forms the joining point at the master cylinder. The connection must remain fluid-tight so that the reservoir can supply the master cylinder without losing fluid or drawing air.

This is the low-pressure reservoir-feed connection. It is different from the pressure-side brake hose that carries hydraulic pressure toward the ABS modulator and rear caliper.

What You Will Receive

1 × Genuine Royal Enfield rear master-cylinder connector kit – 148715/B

The reservoir tube, remote reservoir, complete master cylinder, rebuild kits, brake hoses, caliper parts, brake fluid, tools and installation labour are not included. The listing guarantees the manufacturer-packed connector kit identified by 148715/B; do not assume unrelated parts are included.

When Should This Kit Be Replaced?

• Brake fluid is visibly seeping from the connector-to-master-cylinder joint
• The connector has been cracked, bent, distorted or damaged during removal
• The connection no longer retains the reservoir tube securely
• A sealing component at the connection is hardened, cut, swollen, flattened or missing
• The connector was disturbed during rear master-cylinder or reservoir-tube service and cannot be safely reused
• The old connector is missing from a dismantled brake assembly

Diagnostic and Safety Note

Do not assume every wet area near the rear master cylinder is a connector leak. Clean the assembly and identify the exact source. Inspect the reservoir, feed tube, connector joint, master-cylinder body, pressure-side banjo connection and nearby hose routing. Fluid can travel along the tube or master-cylinder body and make the leak appear to start elsewhere.

Brake-system warning: Brake fluid loss, trapped air or incorrect assembly can cause weak or complete loss of rear braking. Do not ride the motorcycle with a leak, falling reservoir level, spongy pedal, excessive pedal travel or uncertain brake operation. Have the system repaired, filled, bled and checked by a trained motorcycle technician.

Installation Notes

• Secure the motorcycle and protect painted, plated and plastic surfaces from brake fluid.
• Use only the brake-fluid specification and workshop procedure prescribed for the motorcycle.
• Clean the area before disassembly so dirt cannot enter the hydraulic system.
• Identify whether the leak is from the connector, reservoir tube, master-cylinder body or pressure-side hose before replacing parts.
• Compare the new 148715/B connector kit with the removed components before installation.
• Inspect the reservoir tube end; a split, swollen or hardened tube may also require tube kit 148718/B.
• Do not force, drill, trim, heat or chemically alter the connector to make it fit.
• Install every supplied sealing component in the correct orientation and do not reuse a damaged seal.
• Bleed the rear brake system fully using the model-specific procedure after the fluid circuit has been opened.
• Check pedal feel, reservoir level and every disturbed joint for leakage before road use.
• Reinspect the repair after a controlled stationary test and again after the technician's specified check interval.

Important Return-Prevention Check

Before opening the package, confirm all of the following:

• The required item is the rear master-cylinder connector kit, not a reservoir tube or brake hose
• The required exact part number is 148715/B
• The motorcycle is an Interceptor 650 or Continental GT 650 with the applicable Twin 650 rear master cylinder
• The old connector shape, inlet angle, retaining arrangement and reservoir-tube interface match
• The master cylinder has not been replaced with a different assembly
• The leak has been traced to this connection rather than the tube, reservoir, pressure hose or master-cylinder body

We do not offer exchanges. A correctly supplied item is not returnable or refundable after delivery, opening, installation, testing or use. Wrong model selection, ordering the connector instead of the tube or hose, or an incorrect diagnosis does not make the supplied part incorrect. Record a complete unboxing video and report a wrong, missing or transit-damaged item within 24 hours with the required proof.

Frequently Asked Questions

What is Royal Enfield part 148715/B?

It is the connector kit fitted at the reservoir-fluid inlet of the applicable rear brake master cylinder.

Does it fit the Royal Enfield Interceptor 650?

Yes, it is a confirmed Twin 650 rear master-cylinder application. Order only after confirming that your motorcycle requires exact part 148715/B and that the existing connector design matches.

Does it fit the Royal Enfield Continental GT 650?

Yes, the connector-kit family is shown in the Continental GT 650 rear brake assembly. Earlier literature may show 148715/A, so confirm the required revision and physical connector before opening the package.

Is this the rear brake reservoir hose?

No. The reservoir tube is a separate part, commonly referenced as 148718/B. This listing is for connector kit 148715/B at the master-cylinder end.

Is this a rear brake hose or ABS hose?

No. Pressure-side hoses between the master cylinder, ABS modulator and caliper are different parts.

Does the kit include the complete rear master cylinder?

No. It includes one manufacturer-packed connector kit only. The complete master cylinder and internal service kits are separate.

Will it fit the Super Meteor 650, Shotgun 650, Bear 650 or Classic 650?

Fitment is not confirmed in this listing. Do not order based only on the 650 engine size or a similar appearance.

Can I replace it without bleeding the rear brake?

Opening or disturbing the fluid-feed connection can introduce air. The rear brake must be filled, bled and safety-checked using the correct workshop procedure before the motorcycle is ridden.

Will this kit fix a spongy rear brake pedal?

Only if the diagnosed cause is leakage or air entry at this connector. A spongy pedal can also result from air elsewhere, low fluid, a damaged hose, master-cylinder wear, caliper problems or incorrect bleeding.

Which brake fluid should I use?

Use only the type specified in the motorcycle's current owner's or workshop manual. Do not mix fluid specifications or use contaminated fluid.

Can I reuse the old reservoir tube?

Only if a trained technician confirms that it is flexible, undamaged, correctly sized and secure. Replace a split, hardened, swollen or loose tube with the correct tube kit.

Buy Genuine Royal Enfield 148715/B Online

Order the genuine rear master-cylinder connector kit for the applicable Royal Enfield Interceptor 650 and Continental GT 650 from Under The Hood. Shipping is available across India and to international destinations. Confirm the exact part number, connector design and leak source before placing the order.

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