News Yoshimura Parts: Kawasaki KX450F & KX250F

Yoshimura Parts: Kawasaki KX450F & KX250F

Motorcycle Parts

Yoshimura R&D has announced that they have extended their lineup of RS-2 Comp and RS-2 Pro exhausts to include Slip-ons and Full Systems for the 2009-2010 KX450F and the 2010 KX250F.

They have also developed a new version of their PIM-2 unit and DATA Box for the 2009-2010 KX450F to re-tune the electronic fuel-injection system for more power and better throttle response.

Both of these bikes are a blast to ride from the factory, but put Yoshimura in the mix and they quickly turn from fun Sunday rides into ferocious performance machines!

RS-2 Exhaust Systems

The RS-2 is the spiritual successor of Yoshimura’s original TRC design. It features a pyramidal shape that allows for a larger interior volume, meaning higher exhaust flow with less noise.

Thanks to this design the RS-2 makes great power, gives you that classic Yoshimura sound, and keeps noise pollution to a minimum.

The full RS-2 Comp system pairs the race-proven RS-2 exhaust with a Yoshimura-designed header and mid-pipe for even bigger power gains.

The full system includes a stainless steel header and mid-pipe, stainless/aluminum RS-2 muffler with USFS-approved spark-arrestor insert, all of the necessary installation hardware, and detailed instructions for easy setup.

The RS-2 Pro series uses the same design as the RS-2 Comp, but is available in both titanium/titanium and titanium/carbon construction for the more competitive racers looking to save some weight.

In addition to these lightweight, high-strength materials, Yoshimura also skips the spark-arrestor insert in favor of an AMA Pro-Racing sound insert for closed-course competition.

The RS-2 Pro system includes a titanium header and midpipe, titanium/titanium or titanium/carbon muffler, and is just as easy to install thanks to the included hardware and instructions.

2009-2010 KX450F

RS-2 Stainless/Aluminum Full System
Part Number: 2446503
MSRP: $595.00

RS-2 Titanium/Carbon Full System
Part Number: 2446162
MSRP: $895.00

RS-2 Titanium/Titanium Full System
Part Number: 2446167
MSRP: $845.00

RS-2 Stainless/Aluminum Slip-On
Part Number: 2446703
MSRP: $395.00

2009-2010 KX250F

RS-2 Stainless/Aluminum Full System
Part Number: 2427503
MSRP $595.00

RS-2 Titanium/Carbon Full System
Part Number: 2427162
MSRP $895.00

RS-2 Titanium/Titanium Full System
Part Number: 2427167
MSRP $845.00

RS-2 Stainless/Aluminum Slip-On
Part Number: 2427703
MSRP $395.00

PIM-2 Unit and DATA Box

Yoshimura has been a leader in high-performance EFI management systems for years, and those years of experience lead to the development of the PIM-2, an advanced fuel-mapping device that plugs right into your stock wiring harness.

Each PIM-2 unit comes pre-loaded with two different fuel maps designed for use with either a Yoshimura Slip-on muffler, or a Full Exhaust System.

If those presets aren’t enough for you, the Yoshimura website has dozens of additional configuration maps available for you to download and install.

Each PIM-2 kit includes the PIM-2 unit, mounting kit, software disc, USB connector cable, and simple installation instructions.

The PIM-2 can also be paired with the DATA Box system, which includes an air-fuel sensor and an amplifier box that connects to the PIM-2.

With this system installed, the PIM-2 can automatically adjust the air and fuel mixture, and create new custom fuel-maps to maximize performance on the track.

Each DATA Box kit comes with the necessary installation hardware, but may require minor modification of the exhaust system to accept the air-fuel sensor fitting.

EMS PIM2 Unit
Part Number: R-433-2446
MSRP: $339.95

Yoshimura DATA Box
Part Number: R-433-DATA
MSRP: $429.00

2022 Triumph Bonneville Bobber First Look (11 Fast Facts)

The 2022 Triumph Bonneville Bobber enjoys a wide range of updates that include functional and aesthetic. The changes are, in part, to meet Euro...

2021 MV Agusta Dragster RR SCS RC First Look (9 Fast Facts)

The 2021 MV Agusta Dragster RR SCS RC is the new flagship of the urban-brawling Dragster lineup. The RC stands for Reparto Corse, and...

2022 Triumph Bonneville T100 First Look (9 Fast Facts)

The Triumph Bonneville T100 gets a more powerful and higher-revving motor for 2022,  along with a lighter chassis and upgraded suspension as the British...

2022 Triumph Street Twin First Look (7 Fast Facts)

The best-selling Triumph Street Twin is back with motor changes to meet Euro 5 standards, upgraded styling, and a classy new variant. Let’s take...

2021 Harley-Davidson Pan America 1250: 150 HP ADV [17 Fast Facts]

Harley-Davidson officially unveiled Monday its all-new adventure touring motorcycles, the 2021 Pan America 1250 and Pan America 1250 Special. The Motor Company released all the...

Story of Warner Riley’s 200+ MPH Run Aboard a Sportster 50 Years Ago!

50 years ago Warner Riley began working toward having the World’s Fastest Conventional Motorcycle. With help from S&S Cycle in Wisconsin, topping 200 mph...