Product Description
The KAB00238/A Piston Assembly is the internal heart of your motorcycle’s rear braking system. Over time, the rubber seals on the piston can wear down or harden due to heat and old brake fluid, leading to a “spongy” rear brake pedal, fluid leaks, or a loss of stopping power.
This genuine OEM kit allows you to rebuild the master cylinder to factory specifications without replacing the entire expensive housing. Precision-engineered for a perfect bore fit, it includes the internal piston and high-pressure sealsrequired to maintain a vacuum-tight hydraulic circuit. It is an essential part for riders performing scheduled brake maintenance or repairing a failing rear master cylinder on BS6-compliant Royal Enfield models.
Key Features:
-
Authentic OEM Quality: 100% original Royal Enfield spare (PN: KAB00238/A) ensures exact seal dimensions and material density.
-
Restores Braking Power: Eliminates brake fade and spongy lever feel caused by worn internal components.
-
Fluid Compatible: Specifically designed to resist the corrosive effects of DOT 4 brake fluid.
-
Cost-Effective Repair: A professional-grade alternative to replacing the complete rear master cylinder unit.
-
Direct J-Series Fitment: Sized specifically for the modern ByBre or factory rear master cylinder setups found on 350cc J-platform bikes.
Technical Specifications:
-
Part Number: KAB00238/A (also listed as PSKAB00238)
-
Component Type: Master Cylinder Piston Kit (Rear)
-
Material: Precision-Machined Aluminum & High-Grade Nitrile Rubber
-
Quantity: 1 Assembly
Vehicle Compatibility:
-
Royal Enfield Classic 350 Reborn (2021+ J-Series)
-
Royal Enfield Meteor 350 (All Variants)
-
Royal Enfield Hunter 350
-
Royal Enfield Bullet 350 (New J-Series Model)
-
Royal Enfield Goan Classic 350
-
Note: Specifically for the Rear Master Cylinder. For the Front Master Cylinder, please use Part No. KAB00247/A.











Reviews
There are no reviews yet