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ADV NewsNew Yoshimura Exhaust Adds Power to Honda’s CRF300L/Rally

New Yoshimura Exhaust Adds Power to Honda’s CRF300L/Rally

Give the small-bore CRF300L and CRF300L Rally more oomph.

Published on 05.25.2021

Known for their race bred aftermarket exhaust systems, Yoshimura is always expanding their line of performance products. The latest addition to their arsenal is the development of a RS-4 slip-on, as well as a full exhaust system for Honda’s new CRF300L and Rally edition. The RS-4 is not only lighter than stock but also adds more power to both machines. “We stepped up to the plate and the results were fantastic!,” states Yoshimura. 

According to the aftermarket company, the slip-on provides 14.2% more power on the bottom end of the spectrum paired with equal top end power as the stock unit. In addition, the full exhaust system gives the new CRF an extra 5.9% peak HP while improving the power across the entire spectrum enabling the 286cc engine to optimize performance while saving significant weight.

The newly developed RS-4 for the CRF300L models is also designed to give the small-bore dual sport bikes a distinct exhaust note at idle and under load. Also available is a USFS approved spark arrestor for those riders wishing to take to the trails in the great outdoors.

RS-4 Slip-on and Full System Features

  • Pentagonal-shaped sleeve
  • Poly-resonant chamber helps reduce noise
  • Two-stage stepped baffle
  • Turn-out carbon fiber end-cap
  • Stainless steel tail-pipe
  • RS-4 Stainless Slip-on: weight 7.6lbs vs Stock muffler weight 10.0lbs.
  • RS-4 Stainless Full System: weight 9.5lbs vs Stock full system weight 12.3lbs.
  • MSRP: $519 (slip-on); $619 (full-system)

Other Customization Options


In addition to the RS-4, Yoshimura has also launched a few more bits to further customize the look of the CRF300L and CRF300L Rally. The new Fender Eliminator Kit and LED Turn Signal Kit incorporate Yoshimura’s new Shrink Solder Connectors, weather tight light housing, and brighter DOT compliant LED light.

The RS-4, Fender Eliminator and Turn Signal Plates are all designed, developed and made in the USA. For more information visit

Author: ADV Pulse Staff

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New Yoshimura Exhaust Adds Power to Honda’s CRF300L/Rally - ADVENTURE & OVERLAND MOTORCYCLE TRAVEL
May 25, 2021 12:13 pm

[…] post New Yoshimura Exhaust Adds Power to Honda’s CRF300L/Rally appeared first on ADV […]

May 29, 2021 8:11 am

If I am reading the numbers right, for off-road use, seems like the slip-on version offers the better buy. The significant bump in power in the lower-RPM range would be beneficial in the dirt and almost getting the same amount of weight savings when compared to the full-system.

May 12, 2022 4:16 am
Reply to  SoCalRider

Easy to install and give the bike a real nice note. Ordered from the states on Saturday and arrived on Wednesday, when your on the other side of the world that’s service we don’t get in Australia anymore.

June 2, 2021 4:33 am

Their dyno chart has nothing to do with what the customer’s results will be. The pipes are noisy as hell also.

April 21, 2022 2:39 am

More hp means less mpg . No thanks ,with the price of gas I’ll keep it stock and get there 30 seconds behind you . This is not a race bike ,its not a enduro , its a trail bike that’s street legal . Stop trying to make it something its not . Its over 300 pounds for Christ sake if you want more power lose some weight .


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