4-Piston CNC Disc Brake Caliper – Electric Motorcycle Upgrade

Upgrade Your Braking System with the M16 Four-Piston Disc Brake Caliper

Take your electric motorcycle or scooter's stopping power to the next level with this high-performance four-piston disc brake caliper. Engineered for daily commuting and demanding rides alike, this precision-crafted caliper delivers balanced, responsive braking with a solid, confident feel every time you squeeze the lever.

Why Riders Choose This Caliper

• Opposed Four-Piston Synchronous Push Structure: Brake pads make even, balanced contact with the disc, delivering linear, consistent braking force and a shorter stopping distance.
• Full CNC Aviation Aluminum Alloy Construction: Machined from a single billet of high-grade aluminum alloy for exceptional rigidity, impact resistance, and deformation resistance — without adding unnecessary weight. Lightweight design reduces unsprung load for more agile handling.
• 84mm Standard Hole Spacing — Direct Bolt-On Fit: Compatible with a wide range of electric motorcycles, electric light motorcycles, and the majority of scooters. No adapter plates, no drilling — a straightforward upgrade even for first-time modifiers.
• High-Temperature Oil Seals & Precision Pistons: Reliable sealing performance ensures no oil leakage or seepage under sustained heavy use. Hydraulic transmission stays smooth and consistent, keeping your brake feel firm and responsive over the long term.
• Pre-Installed High-Friction Brake Pads: Factory-fitted brake pads with a high friction coefficient perform consistently in both high and low temperature conditions. Quiet operation, excellent wear resistance, and gentler on your brake disc — reducing long-term maintenance costs.
• Streamlined Hollow Heat Dissipation Design: The open body structure accelerates airflow around the caliper, quickly dispersing frictional heat during extended downhill or continuous braking, effectively suppressing brake fade and maintaining stable braking force.
• Premium Two-Tone Aesthetic: Delicate milling texture paired with gold accent screws and a 3D-engraved MTRJE brand logo — a functional upgrade that also enhances your motorcycle's visual appeal.

Specifications

Compatible With

Designed to fit most electric motorcycles, electric scooters, and pedal motorcycles with standard 84mm caliper mounting hole spacing — including popular models in the No. 9 and Xiaoniu series. Direct bolt-on installation with original hole screws; no adapter brackets or custom machining required.

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Brake Safety Information

For guidance on motorcycle brake maintenance and safety standards, refer to the U.S. Consumer Product Safety Commission (CPSC) for general product safety information relevant to vehicle components and aftermarket parts.

Frequently Asked Questions

Q: What is the mounting hole spacing for this four-piston disc brake caliper?

A: The caliper uses a standard 84mm mounting hole spacing, making it compatible with a wide range of electric motorcycles, electric scooters, and most pedal motorcycles. It installs directly with original hole screws — no adapter codes or drilling needed.

Q: Is this caliper compatible with my electric scooter or motorcycle?

A: This four-piston caliper is designed to fit most electric motorcycles, electric light motorcycles, and the majority of scooters with standard 84mm caliper hole spacing, including popular brands like No. 9 and Xiaoniu series. Check your current caliper's mounting hole spacing before purchasing.

Q: Does the caliper come with brake pads?

A: Yes. The caliper comes pre-installed with high-friction coefficient brake pads from the factory. These pads are designed for quiet, wear-resistant performance in both high and low temperature conditions, and are less likely to scratch your brake disc.

Q: Will the caliper hold up under heavy, continuous braking without overheating?

A: Absolutely. The streamlined hollow heat dissipation body design accelerates airflow to rapidly dissipate frictional heat during prolonged downhill rides or heavy braking sessions. Combined with high-temperature-resistant oil seals, the caliper is built to resist brake fade and maintain consistent hydraulic pressure over extended use.

Q: Is this caliper difficult to install for beginners?

A: Not at all. The 84mm standard hole spacing allows for a direct bolt-on installation using your motorcycle's existing screw holes. No adapter plates, drilling, or polishing are required, making it an accessible upgrade even if it's your first brake modification.