Yoshimura · RS-3 · Full System
The Yoshimura RS-3 Stainless Full System is a Race Series exhaust system built specifically for the Honda Monkey 2019–2026. Developed to match the Monkey’s retro character, this full system pairs a compact RS-3 design with carefully chosen details aimed at delivering a fitting tone and a clean, finished look.
With stainless construction and an integrated heat shield, the system is designed as a complete replacement solution for riders looking to update both style and performance. It also features an installed 18mm O2 sensor bung for straightforward sensor placement on applicable setups. See the fitment table on the page to confirm application.
Created specifically for the Honda Monkey platform, this pint-sized RS-3 brings Yoshimura’s Race Series styling to a small-displacement bike without looking oversized. The custom inner core baffle is designed to help produce a sound character intended to match the Monkey’s playful personality.
This full system includes a high temperature ceramic coated end cap with a titanium tip for a distinctive, premium appearance. An integrated heat shield is also built in, adding a factory-like touch and helping the overall system look complete on the Monkey.
Built as a stainless full system, this RS-3 package is designed to replace the complete exhaust assembly rather than only a muffler section. The listing also notes the Yoshimura RS-3 Stainless Full System weight: 5.5 Lbs. vs Stock Full system weight: 11.2 Lbs.
Development
Yoshimura developed this RS-3 full system around the Honda Monkey, aiming to complement the bike’s retro styling while bringing Race Series character to a compact layout. The design includes a special inner core baffle and an integrated heat shield, with the overall package intended to balance visual style with a tone that suits the Monkey’s fun, small-bike attitude.
Engineering
This exhaust system is specified as stainless and is finished with a high temperature ceramic coated end cap featuring a titanium tip. The system also includes an 18mm O2 sensor bung installed, supporting clean sensor mounting where required. For riders evaluating optional accessories, the sound insert and spark arrester options are shown on the page for reference.
Installation
To help with product review and setup, the page includes product photos, a product video, a dyno chart, and an installation PDF. These resources are useful for getting a clearer look at the RS-3’s compact design on the Monkey, understanding the overall layout of the full system, and referencing installation guidance before beginning the job.
| Part Number | 12130A5500 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| Series | RS-3 |
| System Type | Full System |
| Material | Stainless |
| Spark Arrester | Not included |
| Shipping Weight | 11 lb |
| Barcode | 00840025907744 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Honda | Monkey | 2019–2026 |
Fitment as listed by Yoshimura for part number 12130A5500.
| Part Number | Type | Included With This System |
|---|---|---|
| INS-28-K | Sound Insert | No |
| SA-18-K | Spark Arrester | No |
Instructions / What's Included (PDF)
Provided by Yoshimura. Opens in a new tab.
