CHINO, CA (September 1, 2017)
For 2018 Yamaha made some major refinements to the already potent YZ450F. Adding to the usable and tractable power is how we make the new YZ450F even better.

Now there can be more power to rip holeshots, yet making the bike user-friendly at the end of the moto when your right-hand gets a little frisky. The new Yoshimura RS-4 Signature Series full system adds 2.8% more h.p. and 1.4 ft-lb. more torque to give the rider better, more linear throttle response.

Proudly made in the USA!

2018 Yamaha YZ450F with new Signature Series RS-4 TI/CF/CF

2018 Yamaha YZ450F with new Signature Series RS-4 SS/AL/CF

2018 Yamaha YZ450F with new Signature Series RS-4 SS/AL/CF

2018 Yamaha YZ450F Signature Series RS-4 pricing

Yamaha YZ450F 2018 Signature RS-4 SO SS/AL/CF Part # 234822D320

MSRP: $495.00


Qualified manufacturer declared “Replacement Part”

Yamaha YZ450F 2018 Signature RS-4 FS SS/AL/CF Part # 234820D320

MSRP: $725.00


Qualified manufacturer declared “Replacement Part”

Yamaha YZ450F 2018 Signature RS-4 FS TI/TI/CF Part # 234821D720

MSRP: $1129.00


Qualified manufacturer declared “Replacement Part”

Yamaha YZ450F 2018 Signature RS-4 FS TI/CF/CF Part # 234821D220

MSRP: $1189.00


Qualified manufacturer declared “Replacement Part”

Signature Series by Yoshimura –
Introducing Signature Series by Yoshimura – an offering of exhaust systems that a dealer can install with confidence. Our Signature Series lineup is the answer for today’s dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of our off-road applications. Everyone of our Championship Winning Motocross exhaust systems and nearly all of our ATV/Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.

About Yoshimura –
Yoshimura is “The Leader in Performance” and has been for 60 years. With unmatched skills, knowledge and passion for racing, Yoshimura is on the forefront of the aftermarket. Yoshimura exhaust systems are race bred and feature the same legendary performance, fit, and quality that has been our trademark for six decades. To learn more about Yoshimura and view our wide variety of performance products, visit www.yoshimura-rd.com.