About the Product
Brembo M4 P4 34 High Performance Front Brake Caliper
Cast Monobloc | 108mm Radial Mount | Titanium Grey | Left Side Caliper
Part Number: 120A39710
The Brembo M4 120A39710 is one of the most iconic high-performance radial brake calipers ever developed for modern sportbikes. Designed using MotoGP-derived monobloc technology, the M4 combines lightweight cast aluminum construction, exceptional rigidity, and powerful 34mm piston braking performance to deliver outstanding stopping power and rider confidence for aggressive street and track riding.
Manufactured as a single-piece cast monobloc caliper and finished in Brembo’s signature titanium grey anodized coating with hand-painted red Brembo lettering, the M4 remains one of Brembo’s most respected and widely used Upgrade Line brake calipers worldwide.
Item Summary
- Genuine Brembo M4 front brake caliper
- Brembo Part Number: 120A39710
- LEFT side caliper
- Cast aluminum monobloc construction
- 108mm radial mount spacing
- 22.5mm offset
- 4 × 34mm aluminum pistons
- Titanium grey anodized finish
- Hand-painted red Brembo logo
- Brembo Upgrade Line product
- Brembo brake pads included
- Compatible with 32–34mm disc height
- Lightweight high-rigidity design
- Designed for aggressive street and track riding
- Manufactured in Italy
MotoGP-Derived Monobloc Technology
The Brembo M4 utilizes advanced monobloc technology directly inspired by Brembo’s MotoGP and World Superbike racing experience. The caliper body is manufactured from a single cast aluminum structure, dramatically increasing rigidity while minimizing flex during aggressive braking.
Compared to conventional multi-piece calipers, the monobloc design provides:
- Improved braking precision
- Sharper lever feel
- Better hydraulic consistency
- Enhanced rider feedback
- Greater resistance to flex under load
The result is exceptionally stable and predictable braking performance under both road and track conditions.
Cast Aluminum Monobloc Construction
The M4 caliper body is manufactured using Brembo’s advanced gravity casting process and machined as a single-piece monobloc structure. Brembo specifically developed this technology to combine lightweight construction with exceptional rigidity and operating precision.
Construction Benefits
- Exceptional structural rigidity
- Reduced caliper flex
- Improved braking consistency
- Lightweight performance
- Enhanced modulation
- Race-inspired hydraulic precision
The M4 remains one of Brembo’s benchmark radial calipers due to its excellent balance of performance, reliability, and affordability.
Advanced 4 × 34mm Piston Layout
The Brembo M4 utilizes four 34mm aluminum pistons specifically designed to deliver immediate braking response, strong stopping power, and exceptional modulation characteristics. Brembo states the M4 provides “powerful and precise braking” while maintaining excellent controllability.
Performance Benefits
- Strong braking power
- Immediate lever response
- Excellent modulation
- Progressive braking feel
- Improved rider confidence
The piston layout and hydraulic design make the M4 ideal for both aggressive street riders and trackday enthusiasts.
Premium Titanium Grey Finish
The M4 features Brembo’s signature titanium anodized surface treatment with hand-painted red Brembo lettering. This premium finish enhances durability and corrosion resistance while delivering authentic factory superbike aesthetics.
Finish Benefits
- Premium superbike appearance
- Improved corrosion resistance
- Enhanced surface durability
- Authentic Brembo racing aesthetics
Technical Specifications
|
Specification |
Details |
|
Brand |
Brembo |
|
Model |
M4 |
|
Part Number |
120A39710 |
|
Position |
Front Left |
|
Construction |
Cast Aluminum Monobloc |
|
Mount Type |
Radial Mount |
|
Mount Spacing |
108mm |
|
Offset |
22.5mm |
|
Pistons |
4 |
|
Piston Diameter |
34mm |
|
Piston Material |
Aluminum |
|
Disc Height Compatibility |
32–34mm |
|
Disc Thickness |
4.5–5.5mm |
|
Material |
Cast Aluminum |
|
Finish |
Titanium Grey Anodized |
|
Weight Without Pads |
Approx. 800–1015g |
|
Brake Pads Included |
Yes |
|
Friction Area |
21cm² |
|
Brake Fluid |
DOT 4 |
|
Recommended Master Cylinder |
19x18 or 19x20 |
|
Product Line |
Brembo Upgrade Line |
|
Made In |
Italy |
Included In The Box
- Brembo M4 left-side caliper
- Brembo high-performance brake pads
- Pad anti-vibration spring
- Brembo stickers
- Brembo thermotape temperature strips
- Brembo installation instructions
Key Features
Cast Monobloc Construction
Single-piece monobloc design improves rigidity and braking precision.
4 × 34mm Pistons
Large aluminum pistons provide powerful and progressive braking response.
MotoGP-Derived Brembo Technology
Technology developed directly from Brembo racing experience.
Lightweight High-Performance Design
Advanced casting technology minimizes weight while maximizing rigidity.
Premium Titanium Finish
Titanium anodized coating with red Brembo lettering creates authentic factory superbike styling.
Compatible Brake Pads & Spare Parts
Genuine Brembo Compatible Pads
|
Pad Compound |
Part Number |
Intended Use |
|
Brembo HH Sintered Pads |
OE Type |
Street / Track |
|
Brembo Z04 Racing Pads |
107A48639 |
Professional Racing |
|
Brembo Racing Pads |
Various |
Track Use |
Replacement Components
|
Spare Part |
Description |
|
Pad Spring |
Brembo OEM replacement |
|
Rubber Bleeder Cover |
Brembo replacement |
|
M8x1.25 Bleeder Screw Kit |
Brembo OEM replacement |
|
Seal Kit |
Brembo rebuild kit |
|
Temperature Strips |
Brembo thermotape indicators |
Matching Caliper
|
Side |
Part Number |
|
Right Caliper |
120A39720 |
The complete Brembo M4 left/right caliper kit is sold under part number 220A39710.
Recommended Supporting Components
Recommended Brembo Master Cylinders
For optimal braking feel and hydraulic performance, Brembo commonly recommends:
- Brembo 19RCS
- Brembo 19x18
- Brembo RCS Corsa Corta
These master cylinders maximize braking modulation and rider feedback.
Recommended Brake Rotors
Compatible with:
- Brembo Serie Oro rotors
- Brembo T-Drive rotors
- Brembo SuperSport rotors
- High-performance OEM rotors
Designed for approximately 5.5mm rotor thickness and 32–34mm disc height applications.
Popular Motorcycle Applications
The Brembo M4 120A39710 is commonly installed on:
- Yamaha YZF-R1
- Yamaha YZF-R6
- Ducati Panigale models
- Kawasaki ZX-10R
- Suzuki GSX-R1000
- Honda CBR1000RR
- BMW S1000RR
- Triumph Speed Triple
- Premium naked and superbike builds
Some applications may require spacers or mounting hardware depending on rotor size and fork configuration.
Important Fitment Notes
- Designed for motorcycles utilizing 108mm radial mount spacing
- LEFT side caliper only
- Compatible with 32–34mm disc height
- Some motorcycles require spacers and longer mounting bolts
- Professional installation strongly recommended
- Brake system must be properly bled after installation
- ABS compatibility varies depending on motorcycle application and ABS calibration
Why Choose the Brembo M4 120A39710?
The Brembo M4 remains one of the most respected high-performance radial brake calipers ever produced. Combining MotoGP-derived monobloc construction, powerful 34mm pistons, lightweight cast aluminum architecture, and exceptional braking modulation, the M4 delivers world-class braking performance for aggressive street and track riders alike.
Key Advantages
- MotoGP-derived monobloc technology
- Lightweight cast aluminum construction
- Exceptional braking rigidity
- Powerful 34mm piston design
- Outstanding modulation and rider feedback
- Premium titanium anodized finish
- Genuine Brembo racing pedigree
- Made in Italy craftsmanship
For riders upgrading to a proven high-performance Brembo braking system with authentic superbike styling and exceptional braking feel, the Brembo M4 120A39710 remains one of the best radial caliper upgrades available today.
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