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Yoshimura RS-9 Stainless Full Exhaust with Aluminum Mufflers Honda CRF250R 2014-2017



Model #228420H320

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This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

Building performance exhaust systems for the factory race efforts improves our research and development, which improves the overall performance of our products. Adapting technology we learn on the track to our consumer products is what makes the Yoshimura name synonymous with quality and performance. One look at our RS-9 and RS-4 exhaust systems illustrates the endless cycle of development. Working in conjunction with the factory teams has provided us with new ways to increase performance, lower sound levels and centralize mass. The end result is a product that gives you an unparalleled competitive advantage.

Introducing the all-new RS-9 Dual. The CRF's new dual-muffler configuration gave us the opportunity to create an entirely new muffler built specifically for the dual-muffler CRFs. We worked with Top AMA Pro Riders to achieve maximum performance and mass centralization, and to optimize rider usability. We achieved all this while maintaining AMA Regulation sound levels. The RS-9's uniquely sculpted Carbon Fiber end-caps feature a Tunable Insert System, so you can fine-tune power delivery and decibel levels to your specifications.

RS-9 Header/Canister/End Cap Exhaust Dual System Stainless Steel-Aluminum-Carbon Fiber.


  • Parallelogram-shape muffler
  • Maximized internal volume
  • Straight, single core baffle
  • Low-volume sound insert capable
  • Installation Guide
  • Honda CRF250R 2014-2017

Other Part Numbers:
Yoshimura #961-1901

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Vehicle Engine Notes
Honda Moto CRF250R

Who is Yoshimura?

Yoshimura is a globally recognized brand that specializes in manufacturing motorcycle exhaust pipes. The company was founded by Hideo” Pops” Yoshimura back in 1954. As an airplane mechanic during the war, he developed a reputation for working on the vehicles of various service members stationed in Japan. 

He is well known for modifying existing parts to create more power. Fast forward today; the company has become the leading brand when it comes to exhaust pipes and is used by many enthusiasts and racers all over the globe.

Motorsport Heritage

Yoshimura has always had its roots in motorsport racing. The company participated in the Daytona 200, which pave the way for the company to establish itself in the US. Over the years, Yoshimura has created pipes that competed in various racing events such as the AMA Superbike Series and many more.

Throughout the decade, Yoshimura has produced many racing champions, which help propel the company to be one of the most successful brands in the industry.

Global Footprint

All of Yoshimura’s products are designed to give optimum performance. They have pipes that come in different styles and finishes and fit most motorcycle brands and makes. They have multiple research and manufacturing facilities in the US and Japan that allow them to cater to their customers, whichever side of the world they are.

Purchase Yoshimura Products At Vivid Racing

If you are in the market for the best motorcycle exhaust, then Yoshimura is the brand for you. Their experience in the racing world and a long heritage of creating high-quality products have enabled them to develop products often imitated by their competitors but never replicated. To know more about Yoshimura, visit Vivid Racing and check out their list of products that fit your specific need.

  • All Yoshimura of America, Inc. exhaust systems carry a limited one-year warranty against defects in workmanship and/or materials.
Who is Covered:
  • This warranty is provided to the original purchaser of the exhaust system.
What Voids the Warranty:
  • Abuse, misuse, improper installation and modifications.
  • Custom applications
  • No proof of purchase at the time of warranty. Claimant must provide proof of purchase (original receipt or invoice) and a warranty authorization number (RMA) obtained from Yoshimura.
  • Finishes such as plating or painted surfaces with discoloration or rust due to inclement weather conditions, exposure to salt, exposure to chemicals, or lack of maintenance by the customer are not covered.
  • International grey-market product purchased through a dealer/distributor not authorized for your country will not be supported by this warranty.
  • Electrical parts are not covered under warranty.
Extent of Warranty:
  • Any defective exhaust system properly returned to Yoshimura will be repaired or replaced by Yoshimura. Yoshimura is not responsible for any other expense incurred by the customer under the terms of this limited warranty, nor is Yoshimura responsible for any damages either consequential, incidental, special, contingent or otherwise; or expenses or injury arising directly or indirectly from the use of the exhaust system. Any exhaust system returned to Yoshimura must be sent at the customers expense along with the proof of purchase and warranty authorization (RMA). Yoshimura reserves the right to determine whether the terms of the warranty, set out above, have been properly followed. In the event that the terms are not followed this warranty is void. Yoshimura is the sole determiner of abuse, misuse, installation errors and modifications - should any of these be found, this warranty is void. The duration of any and all implied warranties are limited to the duration of the express warranty. All incidental or consequential damages are herby excluded. The warranty gives you specific legal rights and you may have other rights, which vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.
  • For International customers, please contact your dealer or distributor regarding warranties.
If you have a problem:
  • If you have a fitment or other problem, or are missing a part, please double-check this trouble shooting guide first:
  • Reference your instruction sheet and double-check all drawings and instructions
    • Make sure muffler clamps are installed correctly (refer to instructions diagram). On many models, there is a right and wrong way to install. Also verify part numbers on headers and tail pipe.
    • Always make sure to install spring-mounted manifolds and flanges on cylinder head prior to installing headers.
    • Always take time to examine problems in detail.
    • When all else fails, call our technical support line at (909) 628-4722. The technical line is open 9:00am - 4:30pm Monday through Friday, PST. Please have the following information handy: Year/Make/Model of motorcycle, date of purchase, place of purchase, batch dates and part numbers (found on header and tail-pipe components).
    • Also, feel free to ask through online e-mail at sales@yoshimura-rd.com, or fax your question/problems to (909) 591-2198.
Technical Questions:
  • See your local dealer or contact Yoshimura R&D directly at 1-800-634-9166 or sales@yoshimura-rd.com

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