Hero Genuine Rear Brake Caliper Piston Seal Kit for Hunk, Xtreme Sports, Xtreme & Karizma ZMR | 06451MA7405S

Hero Genuine Rear Brake Caliper Piston Seal Kit – 06451MA7405S

Restore proper sealing inside the rear disc brake caliper with the Hero Genuine Kit, Seal Piston for compatible Hunk, Xtreme, Xtreme Sports and Karizma ZMR models. This small but critical rubber seal set fits around the rear brake-caliper piston and is used during caliper servicing or overhaul when the existing seal has hardened, swollen, torn, started leaking or is preventing smooth piston movement.

A worn caliper-piston seal can contribute to brake-fluid seepage, sticky piston movement, uneven pad release or poor caliper operation. Replacing it with the correct genuine Hero part helps retain the specified fit inside the original rear brake caliper instead of relying on a universal rubber seal of uncertain size or material.

This listing is for Hero part number 06451MA7405S, also identified in the parts catalogue as 06451-MA7-405 – Seal Set, Piston. It is intended for the rear disc brake caliper on the exact compatible variants listed below.

What This Product Is

• Hero Genuine rear brake caliper piston seal set
• Official description: Kit, Seal Piston / Seal Set, Piston
• Common buyer names: rear disc brake rubber kit, caliper piston seal kit, caliper repair seal and rear caliper overhaul rubber
• Hero part number: 06451MA7405S
• Catalogue-format part number: 06451-MA7-405
• Application: compatible motorcycle rear disc brake caliper

Key Features

• Genuine Hero service part for the compatible original rear brake caliper
• Used to reseal the brake-caliper piston during caliper repair or overhaul
• Helps address seal-related brake-fluid leakage and sticky piston movement
• Correct replacement choice when the existing caliper seal is cut, hardened, swollen or worn
• OEM-specified shape and sizing for the listed Hero model variants
• Suitable for preventive caliper rebuilding when the piston and caliper bore remain serviceable
• Much safer than selecting a universal seal only by visual similarity
• Compact genuine spare that should be installed only in a clean, undamaged caliper assembly

Confirmed Compatibility

• Hero HUNK – November 2015
• Hero Xtreme Sports – February 2015
• Hero Karizma ZMR – May 2014
• Hero X-TREME – April 2014
• Hero XTREME – October 2012
• Hero Hunk – August 2012
• Hero Karizma ZMR – July 2012
• Hero X-TREME, formerly CBZ X-TREME – April 2011
• Hero Karizma ZMR – March 2011
• Hero HUNK – October 2010
• Hero Karizma ZMR – September 2009

Brake position: Rear disc brake caliper on the compatible variants above.

Fitment Note / Return Prevention Note

Before ordering, match the complete Hero part number 06451MA7405S or catalogue number 06451-MA7-405 with the seal required for your motorcycle’s rear brake caliper. Do not order only because the bike is named Hunk, Xtreme or Karizma; these model families were sold in different generations and brake configurations. Confirm the exact model/version, production period, rear-disc-brake setup and existing caliper parts catalogue.

This is a caliper piston seal set only. It will not repair a scratched or corroded piston, damaged caliper bore, seized slider, leaking bleeder, worn brake hose, faulty master cylinder or contaminated brake pads. Have the complete braking system inspected before installation.

What You Will Receive

• 1 × Hero Genuine Kit, Seal Piston
• Part number: 06451MA7405S
• One manufacturer-packed piston seal set
• Caliper piston, brake pads, complete caliper assembly, slider boots, pins, brake fluid and fitting labour are not included unless separately stated

Technical Details

Installation Note

Brake-caliper work should be carried out by a trained motorcycle technician. The caliper must be dismantled and cleaned correctly, and the piston, seal groove and caliper bore must be inspected for scoring, corrosion or deformation. Use only the correct brake-fluid-compatible assembly procedure, refill with the manufacturer-specified brake fluid, bleed all air from the hydraulic system and verify firm brake pressure and free wheel rotation before road use. Never fit a new seal over a damaged piston or into a dirty or corroded seal groove.

Buyer-Focused FAQs

1. What is Hero part number 06451MA7405S?
It is the Hero Genuine piston seal set used while servicing the compatible motorcycle rear disc brake caliper.

2. Is this a complete rear brake caliper?
No. This is only the caliper-piston seal set. The caliper body, piston, bracket, pads, pins and other hardware are not included.

3. Does it fit every Hero Hunk or Xtreme?
No. Fitment is limited to the exact model generations and production-period references listed in the compatibility section. Match the part number before ordering.

4. Is it suitable for the front brake caliper?
This Hero application is listed for the rear disc brake caliper of the confirmed variants. Do not use it for a front caliper unless the same part number is confirmed in that vehicle’s parts catalogue.

5. When should a rear caliper piston seal be replaced?
It is commonly replaced during caliper overhaul when the seal is leaking, hardened, swollen, damaged or contributing to restricted piston movement.

6. Will this kit fix a seized rear brake?
Only when the problem is caused by the piston seal and all other caliper components are serviceable. A corroded piston, damaged bore, seized slider, blocked hose or master-cylinder fault requires additional repair.

7. Is this a genuine Hero spare part?
Yes. The listing is for Hero Genuine part number 06451MA7405S.

8. Can I install it myself?
Brake hydraulic repairs are safety-critical. Professional installation, correct bleeding and a complete brake-function check are strongly recommended.

9. Does the kit include brake fluid or brake pads?
No. Brake fluid, brake pads and all additional caliper parts must be purchased separately when required.

10. How do I prevent ordering the wrong seal kit?
Match the exact part number, bike model, generation or production period, rear-disc configuration and caliper catalogue before placing the order.