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Frequently Asked Questions


How often should I re-pack my muffler?

Unlike their OEM counterparts, Yoshimura Road mufflers need to be repacked every 7,000 - 10,000 miles, while Off-road mufflers need to be repacked every 6-8 hours of use, or after 2 race motos, whichever comes first. Repacking your muffler at the suggested intervals is essential for your exhaust to perform the way it was designed. Heavy use conditions (long distance endurance riding or high RPM operation) will require more frequent maintenance., read more...

Suggested Repacking Intervals

  • Street/Road exhaust systems be repacked every 7,000 - 10,000 miles
  • Off-road exhaust systems should be repacked after 6-8 hours of use, or after 2 race motos

*While these are Suggested Repacking Intervals, other factors may require more frequent repacking; engine modifications, race fuels, riding style, etc. Professional Racers should repack their mufflers more frequently to retain optimal performance and prevent heat damage to their muffle and related components.


Do you repair damaged exhaust?

Yes! If you have a Yoshimura exhaust that has been damaged, and needs refurbishing or repairs, please contact our Sales Department at (800) 634-9166 or email Our Sales Department will assist you with any questions you may have about your damaged exhaust system or the refurbishing process. Turn around time for Exhaust  is approximately 3-5 business days, excluding shipping/transit times.. To learn more about Exhaust System Refurbishing, read more...


What is the turn around time for Engine Services?

Turn around time for Engine Service is approximately 1-2 weeks. After we receive your engine, our Engine Service Department will begin tear-down and each component will be meticulously inspected. At this time, we may contact you if any repairs or components are beyond servicable-wear specifications. After a thorough inspection and cleaning, our masterful engine builders begin reassembly of your engine with the specifications for your build. Depending on the level of Engine Service desired, some builds may take longer as we have to order parts or related components. To request Yoshimura Engine Service, please contact our Sales Department at (800) 634-9166 or email


Do you sponsor riders?

Yes, we do sponsor riders! Apply online at:

  • If you're under the age of 18 years old, your parent/legal guardian must apply for sponsorship.
  • If you're part of a team, include your team name in the "Additional Comments" box that is located towards the end of the form.
  • If you're applying for a team, type the word "Team" in the "Racer First Name" field. Then insert your "Team Name" in the"Racer Last Name" field. List all team members in the "Additional Comments" box that is located towards the end of the form.
  • We encourage all applicants to provide us with you're social media information. 
  • When uploading your resume and profile image, please ensure that it is not a large file. The application will not be processed if its too large of a file.
  • All fields must be filled, if something doesn't apply to you please enter "N/A" in the field.

    QUESTIONS? CALL BIG “E” AT (951) 231-1400

    Good luck!