Upgrade Your Ride: 4-Piston Hydraulic Disc Brake Caliper (JK26)

Take your motorcycle's stopping power to the next level with this precision-engineered 4-Piston Hydraulic Disc Brake Caliper. Built from high-strength CNC-machined aluminum alloy, this large radiation caliper delivers consistent, linear braking feel — whether you're commuting daily, tackling long descents, or making quick maneuvers. Made in Mainland China.

🔥 Superior Braking Performance

Four-Piston Synchronous Pressure: Dual pistons push the brake pads simultaneously, spreading pressure evenly across the full friction surface. Braking torque is increased by over 40% compared to traditional single-piston calipers, significantly shortening stopping distances at all speeds.
Heat-Resistant Design: The optimized large-radiation caliper body rapidly dissipates heat generated during repeated braking — ideal for long downhill runs or intense riding sessions. Maintains stable, consistent braking force even under thermal stress.
Linear Brake Response: Hydraulic transmission provides sensitive, progressive feedback. Light squeeze = gentle deceleration; firm squeeze = strong, controlled stopping. Beginner-friendly yet performance-ready.

⚙️ Precision Craftsmanship & Durability

CNC Integrated Machining: The entire caliper body is formed from a single block of high-strength aluminum alloy via CNC cutting — maximizing rigidity, minimizing flex, and keeping tolerances tight over years of use.
Dual Seal Protection: Imported oil seal + dust ring combo keeps mud, water, and grit out while preventing brake fluid leakage, extending piston service life across all weather and road conditions.
Hard Anodized Finish: Surface treatment delivers excellent corrosion and scratch resistance. No rust, no fading — the caliper looks sharp ride after ride.

🛠️ Easy Installation & Universal Fitment

Complete Hardware Included: Comes with exhaust screws, oil inlet fittings, and installation gaskets to accommodate different oil pipe specifications — ready to install right out of the box.
Lightweight Advantage: Aluminum alloy construction dramatically reduces weight compared to cast iron calipers, lowering unsprung mass for more agile handling, lighter acceleration, and responsive cornering.

✨ Distinctive Modified Look

CNC Metal Texture + Contrast Color Detail: Intricate CNC-cut surface pattern paired with the iconic red piston cap delivers serious mod aesthetic — subtle yet unmistakably performance-oriented.
BNMOKE Branded Piston Cover: Quality detail that sets this caliper apart from generic aftermarket parts and enhances your bike's overall visual identity.

Specifications

Model: JK26
Type: Large Radiation 4-Piston Hydraulic Disc Brake Caliper
Material: High-Strength Aluminum Alloy (CNC Machined)
Surface Treatment: Hard Anodizing
Seal: Imported Oil Seal + Dust Ring
Compatibility: Mainstream electric motorcycles & modified disc brake setups
Country of Origin: Made in Mainland China

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For guidance on motorcycle brake system safety standards, refer to the U.S. Consumer Product Safety Commission (CPSC).

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Frequently Asked Questions

Q: Is this 4-piston brake caliper compatible with electric motorcycles?

A: Yes. The JK26 4-piston hydraulic disc brake caliper is designed for mainstream electric motorcycles and modified disc brake setups. It includes oil inlet fittings and gaskets to suit various oil pipe specifications, making it adaptable for most electric motorcycle disc brake configurations.

Q: What material is this motorcycle brake caliper made from?

A: The caliper body is CNC-machined from high-strength aluminum alloy, providing an excellent strength-to-weight ratio. It is significantly lighter than traditional cast iron calipers, which reduces unsprung mass and improves overall handling. The surface is hard anodized for corrosion and scratch resistance.

Q: Does this caliper include all the hardware needed for installation?

A: Yes. The package includes standard installation accessories such as exhaust screws, oil inlet fittings, and installation gaskets to accommodate different oil pipe sizes. No additional hardware purchases should be required for a standard installation.

Q: How does the 4-piston design improve braking over a standard single-piston caliper?

A: The four pistons apply simultaneous, evenly distributed clamping force across the brake pad's full friction surface. This results in over 40% more braking torque compared to a single-piston caliper, providing shorter stopping distances, more consistent modulation, and better performance during extended or high-speed braking.