51021PRI Arrow complete exhaust Yamaha R125 2025-2026 Pro-Race Racing steel

The Arrow Pro-Race Racing full exhaust for Yamaha R125 2025-2026 is a system developed to deliver the highest level of racing performance, lightweight construction, and sporty sound for Yamaha’s lightweight supersport motorcycle. Directly derived from Arrow’s MotoGP and Supersport racing experience, this complete exhaust system is one of the most aggressive and exclusive upgrades available for riders looking to completely transform the character of the Yamaha R125.

The system combines a racing stainless steel header with an Arrow Pro-Race muffler featuring a compact MotoGP-inspired design. The Pro-Race line was developed from technology used in top-level motorcycle racing and combines a conical body with a cylindrical 98 mm outlet section, creating a distinctive racing appearance.

Arrow Pro-Race full exhaust for Yamaha R125

The muffler features a refined stainless steel end cap, adding both technical value and premium racing aesthetics. The lightweight construction significantly improves:

• Acceleration
• Mid-range torque
• High-rpm performance
• Engine responsiveness
• Overall riding feel

The decat racing configuration allows the Yamaha single-cylinder engine to express a much more aggressive character compared to the stock exhaust system.

Arrow MotoGP-inspired racing sound

The system produces an incredibly deep, metallic, and aggressive exhaust note, directly inspired by MotoGP racing machines. The distinctive Pro-Race muffler shape creates a highly recognizable and engaging racing tone.

Pro-Race design: pure racing style

The compact dimensions and conical-cylinder layout make this exhaust perfect for enhancing the supersport styling of the Yamaha R125, visually lightening the rear section while delivering a true high-end racing appearance.

Euro5+ engine warning light issue?

As this is a non-homologated racing exhaust system, Euro5+ motorcycles may trigger the MIL / Check Engine warning light after installation.

Arrow recommends using:
Arrow A.R.D. – Alert Remover Device

The device is designed to manage catalyst-removal-related errors without modifying the original ECU mapping.

Why choose the Arrow Pro-Race Racing exhaust?

Because it delivers the ultimate combination of MotoGP styling, racing sound, lightweight construction, and sporty performance, transforming the Yamaha R125 into a true track-inspired supersport motorcycle.

Technical features:

• Model: Pro-Race Racing
• Compatibility: Yamaha R125 2025-2026
• Type: Full racing exhaust system
• Homologation: Not street legal
• Muffler material: Stainless steel
• Header material: Racing stainless steel
• End cap material: Stainless steel
• Muffler design: Pro-Race MotoGP style
• Muffler configuration: Conical body with Ø98 mm cylindrical outlet
• Sound: Deep, metallic, aggressive
• DB-killer included: No
• Compatible DB-killer: 11029DB
• A.R.D. device compatibility: Yes
• Possible Euro5+ engine warning light: Yes
• Weight reduction: Yes
• Use: Track / racing

Suitable for: