*Product may vary by application
Emissions Compliance Declaration: QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART"
WARNING: Cancer and Reproductive harm - www.p65warnings.ca.gov
The mighty Yamaha YZ450F is practically all new for 2023 and ready to inspire new MX champions everywhere.
Lets get right to it...the stock system on the Yamaha YZ450F was hard to improve, but we did! The magic of the right tube diameter, right length then our RS-12 was called in to do the work that it was designed to do...perform! Adding power and torque everywhere across the spectrum of the new YZ450 wasn't easy but it was accomplished. Max HP is increased by 8% and max torque is bumped an incredible 13%!
The new RS-12 system unlocked some key power in the right places. The lower and mid RPM range is really enhanced while not disrupting the handling characteristics on the new YZ chassis. Riding with this new added power really made testing the new system a fun project.
Other highlights of the RS-12 system are the machined joints on the key tube junctions to insure a good clean interface between joints. A built in resonator chamber on the muffler, a matte carbon fiber end cap and a PTF low volume sound insert completes the RS-12.
Spark arrestor sold separately.
The RS-12 proudly designed, developed and made in the USA.
Sound Insert/Spark Arrester Options
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Sound Level
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Volume Insert | Spark Arrestor | Included |
 |
INS-38-K | Yes | |
 |
INS-32-K | No |
|
 |
|
SA-19-K | No |
. . . . .
This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product.
Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.