Motorcycle Types Adventure / Dual-Sport 2012 Honda CRF450 R: Yoshimura RS4 (D)

2012 Honda CRF450 R: Yoshimura RS4 (D)

Yoshimura Exhaust

Yoshimura’s RS-4 and RS-4D exhaust applications are now available for the 2012 Honda CRF450R.

The RS-4 muffler was developed in conjunction with the Rockstar Makita Suzuki race team with one purpose in mind: winning championships.

That goal was accomplished during the 2010 AMA Supercross and Motocross season when Ryan Dungey and his Yoshimura-powered RM-Z450 took the motocross world by storm as the first rookie in the history of the sport to dominate both series.

The RS-4 is a unique design with predicated power, a side benefit of a quiet earthy exhaust note that speaks volumes for performance, and offers increased horsepower and torque.

The RS-4 features:

  • Polyresonant duplex chamber
  • Two-staged stepped baffle
  • Maximized muffler volume
  • Innovative carbon cone end cap
  • 3 muffler options: aluminum, titanium, or carbon fiber
  • Titanium and stainless full systems available
  • Low volume sound insert included

The new RS-4D builds on the technology that has made the RS-4 a force to be reckoned with on the racetrack, enhancing its rock solid performance. The RS-4D boasts a unique dual-outlet design that increases the amount of open area at the exhaust outlet. With dual internal baffles, the RS-4D increases the exhaust gas flow rate, resulting in smoother power delivery and increased throttle control, and offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range where riders need it most. The RS-4D is available as a full system, in either Titanium or Carbon Fiber, and comes with an ultra-lightweight carbon fiber end-cap.

The RS-4 and RS-4D have been used by both the Factory Honda and Factory Suzuki teams and is the system of choice for a number of the riders during the 2011 supercross and motocross seasons.

2011 – 2012 Honda CRF450R RS-4 Application

  • Stainless/Aluminum RS-4 Slip-on

    Part Number: 2258703

    MSRP – $395

  • Stainless/Aluminum RS-4 Full System

    Part Number: 2258503

    MSRP – $595

  • Titanium/Carbon RS-4 Full System

    Part Number: 2258162

    MSRP – $995

  • Titanium/Titanium RS-4 Full System

    Part Number: 2258167

    MSRP – $945

2011 – 2012 Honda CRF450 RS-4D Applications

  • Titanium/Titanium RS-4D Full System

    Part Number: 225801E720

    MSRP – $1,045

  • Titanium/Carbon RS-4D Full System

    Part Number: 225801E220

    MSRP – $1,095

 

Clicke here for 2011-2012 Honda CRF450R applications and updates.

 

 

Yoshimura’s RS-4 and RS-4D exhaust applications are now available for the 2012 Honda CRF450R.

The RS-4 muffler was developed in conjunction with the Rockstar Makita Suzuki race team with one purpose in mind: winning championships.

That goal was accomplished during the 2010 AMA Supercross and Motocross season when Ryan Dungey and his Yoshimura-powered RM-Z450 took the motocross world by storm as the first rookie in the history of the sport to dominate both series.

The RS-4 is a unique design with predicated power, a side benefit of a quiet earthy exhaust note that speaks volumes for performance, and offers increased horsepower and torque.

The RS-4 features:

  • Polyresonant duplex chamber
  • Two-staged stepped baffle
  • Maximized muffler volume
  • Innovative carbon cone end cap
  • 3 muffler options: aluminum, titanium, or carbon fiber
  • Titanium and stainless full systems available
  • Low volume sound insert included

The new RS-4D builds on the technology that has made the RS-4 a force to be reckoned with on the racetrack, enhancing its rock solid performance. The RS-4D boasts a unique dual-outlet design that increases the amount of open area at the exhaust outlet. With dual internal baffles, the RS-4D increases the exhaust gas flow rate, resulting in smoother power delivery and increased throttle control, and offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range where riders need it most. The RS-4D is available as a full system, in either Titanium or Carbon Fiber, and comes with an ultra-lightweight carbon fiber end-cap.

The RS-4 and RS-4D have been used by both the Factory Honda and Factory Suzuki teams and is the system of choice for a number of the riders during the 2011 supercross and motocross seasons.

2011 – 2012 Honda CRF450R RS-4 Application

  • Stainless/Aluminum RS-4 Slip-on

    Part Number: 2258703

    MSRP – $395

  • Stainless/Aluminum RS-4 Full System

    Part Number: 2258503

    MSRP – $595

  • Titanium/Carbon RS-4 Full System

    Part Number: 2258162

    MSRP – $995

  • Titanium/Titanium RS-4 Full System

    Part Number: 2258167

    MSRP – $945

2011 – 2012 Honda CRF450 RS-4D Applications

  • Titanium/Titanium RS-4D Full System

    Part Number: 225801E720

    MSRP – $1,045

  • Titanium/Carbon RS-4D Full System

    Part Number: 225801E220

    MSRP – $1,095

Ron Lieback
Ron Lieback
One of the few moto journalists based on the East Coast, Ron Lieback joined the motorcycle industry as a freelancer in 2007, and is currently Online Editor at Ultimate Motorcycling. He is also the author of "365 to Vision: Modern Writer's Guide (How to Produce More Quality Writing in Less Time).

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