Yoshimura · R-77 · Full System
The Yoshimura R-77 Race Series Exhaust System is a full system designed for the Kawasaki Z125-PRO 2017–2026. Built with stainless construction throughout the system and finished with a carbon fiber end cap, it delivers the signature R-77 styling while targeting reduced weight compared to the stock full system.
This U.S.-market configuration is made and marked for the U.S. and is described by the manufacturer as developed specifically for U.S. spec bikes. For riders focused on track-oriented setup and the distinctive R-77 Yoshimura sound, this R-77 full system brings purpose-built engineering to the Z125-PRO platform (see the fitment table below).
This R-77 mini full system uses stainless steel construction throughout the system and is paired with a carbon fiber end cap to complete the distinctive Yoshimura look. As a complete system, it’s built as a dedicated R-77 package for the Z125-PRO application rather than a partial component swap.
Yoshimura lists the stock full system weight at 8.5 Lbs. and the Yoshimura Stainless R-77 full system weight at 5.5 Lbs. The result is a lighter exhaust setup for the Z125-PRO while retaining the full-system layout for a cohesive, performance-focused build.
The manufacturer states this exhaust was designed specifically for U.S. spec bikes and is made and marked for the U.S. Yoshimura R&D of America, Inc. is described as the only authorized distributor in North America for sister companies Yoshimura Japan (YJP) and Yoshimura Asia (YAT).
Materials
Developed for the Kawasaki Z-125 Pro (BR125), this R-77 mini Race Series full system is positioned as track-ready hardware with the brand’s recognizable R-77 layout. Yoshimura describes these systems as handcrafted by a sister company for Yoshimura R&D exclusively for the U.S. market. The build centers on stainless construction throughout the system, finished with a carbon fiber end cap to round out the signature Yoshimura appearance.
Sound
Yoshimura highlights the distinctive R-77 Yoshimura sound as a key part of the experience with this full system. Designed as an R-77 Race Series Exhaust System for the Z125-PRO, it’s aimed at riders who want the character and presence associated with the R-77 line, paired with the simplified, complete nature of a full-system replacement.
Fitment
This R-77 full system is specified to fit Kawasaki Z125-PRO 2017–2026. The page includes the installation PDF for reference, along with media such as a product video and dyno chart. Yoshimura also lists in-house warranty and technical support, a certificate of authenticity, and a full 12-month warranty as part of the ownership package.
| Part Number | 141200U520 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| Series | R-77 |
| System Type | Full System |
| Material | Stainless |
| Shipping Weight | 8 lb |
| Barcode | 00840025909526 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Kawasaki | Z125-PRO | 2017–2026 |
Fitment as listed by Yoshimura for part number 141200U520.
Installation Instructions (PDF)
Provided by Yoshimura. Opens in a new tab.
