Motorcycle Types Adventure / Dual-Sport Yoshimura RS-4 Motocross Exhaust

Yoshimura RS-4 Motocross Exhaust

Motocross Exhaust System

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

I guess you can say that the 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 by storm as the first rookie in the history of the sport to dominate both series.

The RS-4 is a unique looking 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 motocross exhaust system features; polyresonant duplex chamber, two-staged stepped baffle, maximized muffler volume, innovative carbon cone end cap, three muffler options (aluminum, titanium, or carbon fiber), titanium and stainless full systems available with low volume sound insert included.

RS-4 exhaust systems are the choice of both the Factory Honda and Suzuki Supercross / Motocross teams but Yoshimura now has the RS4 slip-on and full-system applications available for the 2011 Yamaha YZ450F and 2011 KTM 350 SX-F.

2011 Suzuki RM-Z450

08-11 RM-Z 450
Stainless RS4 Slip On
Part Number: 2192714
MSRP: $395.00

08-11 RM-Z 450
Stainless RS4 Full System
Part Number: 2192514
MSRP: $595.00

08-11 RM-Z 450
Titanium – Titanium RS4 Full System
Part Number: 2192177
MSRP: $945.00

08-11 RM-Z 450
Titanium – Carbon Fiber RS4 Full System
Part Number: 2192172
MSRP: $995.00

2011 Yamaha YZ450F

2011 YZ 450 F
Stainless RS4 Slip On
Part Number: 234802D320
MSRP: $395.00

2011 YZ 450 F
Stainless RS4 Full System
Part Number: 234800D320
MSRP: $645.00

2011 YZ 450 F
Titanium – Titanium RS4 Full System
Part Number: 234801D720
MSRP: $995.00

2011 YZ450F
Titanium – Carbon Fiber RS4 Full System
Part Number: 234801D220
MSRP: $1,045.00

2011 KTM 350 SX-F

2011 KTM 350 SX-F
Stainless RS4 Slip On
Part Number: 263502D320
MSRP: $395.00

2011 KTM 350 SX-F
Stainless RS4 Full System
Part Number: 263500D320
MSRP: $595.00

2011 KTM 350 SX-F
Titanium – Titanium RS4 Full System
Part Number: 263501D720
MSRP: $945.00

2011 KTM 350 SX-F
Titanium – Carbon Fiber RS4 Full System
Part Number: 263501D220
MSRP: $995.00

Check yoshimura-rd.com for additional applications and updates.

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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