Yoshimura · R-77 · Slip-On
The Yoshimura R-77 Dual Slip-on Exhaust / Carbon Mufflers is a Race Series Exhaust System built to bring competition-driven design to the Kawasaki ZX-14-R 2012–2025. With a dual muffler layout and carbon construction, this slip-on system delivers a purposeful look matched to Yoshimura’s proven R-77 styling.
Key design details include the R-77’s trapezoidal-shaped sleeve, which is shaped to allow a large volume of packing material, along with a straight baffle intended for ample flow. Stainless steel tail-pipes round out the system for a clean, performance-minded finish. An INS-04-K sound insert is included; see the insert options table for additional choices.
Engineering
This R-77 slip-on uses a dual muffler configuration engineered specifically for the ZX-14-R 2012–2025. The twin-can setup complements the bike’s superbike-inspired styling while keeping the design consistent with Yoshimura’s Race Series approach.
Performance
Yoshimura’s trapezoidal-shaped sleeve is designed to hold a large volume of packing material. That packaging-focused shape is a signature part of the R-77 concept and is called out as a contributor to the system’s performance-oriented design.
Technology
The R-77 muffler’s front cap is MIG-welded, and the end cap is riveted with 304-L polished stainless steel rivets and bands. Combined with the innovative end-cap design noted by Yoshimura, it delivers a refined, race-ready level of fit and finish.
Sound
Positioned within Yoshimura’s Race Series Exhaust System lineup, the R-77 Slip-On is described as being developed in the heat of competition. Its overall design blends superbike technology and styling with functional internal volume, centering on the distinctive R-77 trapezoidal canister shape and a straight baffle intended to support ample flow.
Materials
This configuration pairs carbon mufflers with stainless steel tail-pipes for a focused, performance-first build. Yoshimura highlights the construction approach at both ends of the muffler, using a MIG-welded front cap and a riveted end cap secured by 304-L polished stainless steel rivets and bands, along with an innovative end-cap design.
Fitment
This R-77 Dual Slip-on Exhaust / Carbon Mufflers is listed for the Kawasaki ZX-14-R 2012–2025; confirm exact application in the fitment table on the page. An INS-04-K sound insert is included, and an additional insert option is also listed in the sound insert table. For guidance during setup, the installation PDF provided on the page can be referenced.
| Part Number | 1414020220 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| Series | R-77 |
| System Type | Slip-On |
| Material | Carbon |
| Sound Insert (Included) | INS-04-K |
| Shipping Weight | 23 lb |
| Barcode | 00840025902763 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Kawasaki | ZX-14-R | 2012–2025 |
Fitment as listed by Yoshimura for part number 1414020220.
| Part Number | Type | Included With This System |
|---|---|---|
| INS-04-K | Sound Insert | Yes |
| INS-27-K | Sound Insert | No |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
