Yoshimura RS-12 Spark Arrestor 1.500" Insert SA-21-K 2019-2026 Honda KTM Kawasaki

Ensure your machine is trail-ready and forest-legal with the Yoshimura RS-12 Spark Arrestor (1.500"). This OEM Replacement insert is specifically engineered for the RS-12 off-road muffler series, providing a critical safety feature without compromising the signature Yoshimura exhaust note. Moto-House MX understands the importance of versatile performance, and this USFS-approved insert allows you to transition seamlessly from the closed course to public lands.

Designed for maximum Racing Performance and durability, this kit features Yoshimura’s PTF (Precision Taper Fit) technology, which ensures a snug, rattle-free fit and incredibly easy installation or removal. Proudly made in Chino, California, the kit includes the spark arrester insert, end-cap collar, and the necessary set screw. Whether you are racing a CRF450R or exploring on a KX450X, this high-quality component keeps you compliant while maintaining optimal exhaust flow.

Top Features: Yoshimura RS-12 Spark Arrestor

• USFS Approved: Fully compliant with United States Forest Service regulations for off-road riding.
• Precision Taper Fit (PTF): Innovative design allows for a perfect seal and effortless installation/removal.
• Complete Installation Kit: Includes the 1.500" spark arrester insert, end-cap collar, and secure set screw.
• RS-12 Compatibility: Specifically tailored for the latest generation of Yoshimura RS-12 off-road exhaust systems.
• Made in the USA: Expertly designed and manufactured in Chino, California for premium quality.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2021 - 2025	Honda	CRF450R / CRF450RX
2022 - 2024	Honda	CRF250R / CRF250RX
2019 - 2024	Kawasaki	KX450F / KX450X
2021 - 2026	Kawasaki	KX250F / KX250X / KX250
2023 - 2024	KTM	450 SX-F / 450 XC-F
2023 - 2024	Husqvarna	FC 450 / FX 450
2024	Gas-Gas	MC 450F / EX 450F

Frequently Asked Questions

Is this spark arrestor legal for use on public land?
Yes, this insert is USFS (United States Forest Service) approved, making it legal for use in areas where a spark arrestor is required by law.

Does this insert significantly reduce horsepower?
While any insert provides a slight change in backpressure, Yoshimura designs their spark arrestors to minimize restriction, ensuring your bike maintains high-level performance while staying compliant.

Will this fit my RS-4 or other Yoshimura mufflers?
No, this specific insert is designed exclusively for the RS-12 series mufflers with a 1.500" opening. Please check your specific exhaust model before ordering.

Upgrade Your Ride and stay legal on the trails with the best in exhaust technology.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The best motocross shop in Central Florida.