Yoshimura · Full System
The Yoshimura MONKEY 19-26 Straight Cyclone Full Exhaust is a Race Series Exhaust System full system created specifically for the Honda Monkey 2019–2026. Inspired by Yoshimura’s classic Straight Cyclone style, it brings a vintage look to match the Monkey’s distinctive retro design.
Yoshimura lists the system weight at 4.2 Lbs., giving the build a notably lightweight setup compared to the stock full system weight noted by the manufacturer. This U.S.-marked version is described by Yoshimura as specially configured for the U.S. marketplace, with support and documentation tied to Yoshimura R&D of America, Inc. See the fitment table below for exact application details.
Yoshimura positions the Straight Cyclone as a throwback design rooted in the 70’s era when the term Superbike was coined. On the Honda Monkey, the classic Cyclone-inspired look pairs directly with the bike’s retro styling for a distinctive, period-correct appearance.
Yoshimura states the Straight Cyclone full system weighs 4.2 Lbs. The manufacturer also notes a stock full system weight of 11.2 Lbs., highlighting a significant difference on paper for riders who value a lightweight exhaust package on a small-bore platform.
This exhaust is described by Yoshimura as designed specifically for U.S. spec. bikes and made and marked for the U.S. Yoshimura R&D is identified as the only authorized distributor in North America for sister-company products from Yoshimura Japan (YJP) and Yoshimura Asia (YAT).
Fitment
The Straight Cyclone concept is presented by Yoshimura as a blend of old-school inspiration and purpose-built design for the Honda Monkey. By leaning into retro exhaust styling that complements the Monkey’s character, this Race Series full system is intended to make the bike look as intentional as it rides, with a design that stands out without straying from the Monkey’s vintage theme.
Yoshimura describes this as an imported product manufactured by its sister company in Asia, with a focus on craftsmanship. Yoshimura also states the system is specially configured for the U.S. marketplace and not available in any other marketplace. Product support elements listed by the manufacturer include in-house warranty and technical support, a certificate of authenticity, and a full 12-month warranty.
Installation
This product page includes supporting media to help evaluate and install the system, including a product video and an installation PDF. A dyno chart is also shown on the page for reference. For owners planning a complete right-side presentation, Yoshimura notes a right side cover is available but sold separately.
| Part Number | 121300K500 |
|---|---|
| Brand | Yoshimura |
| Product Line | Race Series Exhaust System |
| System Type | Full System |
| Shipping Weight | 1 lb |
| Barcode | 00840025909977 |
| Emissions Compliance | QUALIFIED MANUFACTURER DECLARED "MODIFIED PART" |
| Make | Model | Model Years |
|---|---|---|
| Honda | Monkey | 2019–2026 |
Fitment as listed by Yoshimura for part number 121300K500.
Installation Instructions (PDF)
Provided by Yoshimura. Opens in a new tab.
