Motorcycle Types Adventure / Dual-Sport 2011 Honda CRF250R: Yosh Exhaust

2011 Honda CRF250R: Yosh Exhaust

CRF 250 Exhaust

Yoshimura R&D of America has announced a host of new RS-4 and RS-4D applications for the popular 2011 Honda CRF250R motocross bike. Slip-ons and full motorcycle exhaust systems will be available in a number of configurations.

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

That goal was accomplished during the 2010 AMA Supercross and Motocross season when Ryan Dungey and his Yoshimura-powered RM-Z 450 took the motocross world as the first rookie in the history of the sport to win both the SX and MX 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. RS-4 systems are the choice of both the Factory Honda and Suzuki teams.

Yosh RS-4 Applications:
2011 Honda CRF 250 R Stainless Slip-on
Part Number: 228402D320
MSRP: $395

2011 Honda CRF 250 R Stainless Full System
Part Number: 228400D320
MSRP: $595

2011 Honda CRF 250 R Titanium Full System
Part Number: 228401D720
MSRP: $945

2011 Honda CRF 250 R Carbon Fiber Full System
Part Number: 228401D220
MSRP: $995

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.

RS-4D Applications:
2011 Honda CRF250R Titanium Full System
Part Number: 228401E720
MSRP $1,045

2011 Honda CRF250R Carbon Fiber Full System
Part Number: 228401E220
MSRP $1,095

The RS-4D is the system of choice for a number of Yoshimura-backed riders during the 2011 Supercross season.

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.

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