Daily Grind

Yoshimura Family Reunites with 1964 Honda Suzuka Endurance Motorcycles After 58 Years!

Who would have thought that after 58 years two Honda motorcycles that Pop Yoshimura tuned for the inaugural Suzuka 1...

Yoshimura Debuts New Video About Westby Racing Team

Yoshimura R&D of America, Inc., has been a long-time sponsor, partner, supplier, and technical advisor for Westb...

2021 Honda CRF450R/RX RS-12 Overall Design Features

In this final video we cover the overall features of the all-new RS-12 for the 2021 Honda CRF450R/RX. Everything abo...

Yoshimura Mini Moto Trackday

So much fun can be had at your local track on a mini moto. We hosted a track day at Apex Racing Center in Perris CA....

2021 Honda CRF450R/RX Understanding Exhaust Resonator Tech

In this video our team talks about why this is one of the most complicated systems we have ever built here at Yoshim...

Yoshimura Cycling is Born!

If you have not seen it yet, the offshoot of Yoshimura R&D, Yoshimura Cycling is born! After 18 months of develop...
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Race series product restriction and affirmation


The RACE SERIES product you are purchasing removes, renders inoperative, or bypasses required elements of the emission control systems of EPA, certified motorcycles of motorcyle engines and may only be installed on motorcycles that are restricted to closed course competition. Installation of this product on a motorcyle that is ridden on a public street, highway, or public lands violates the tampering and defeat device provisions of the Clean Air Act & 203(a)(3)(A) and/or & 203(a)(3)(B) and may subject you to a civil penalty of up to $37,000.

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  3. that any motorcycle on which I install the RACE SERIES product will be restricted to closed course competition and will not be ridden on any public street, highway or public lands.