SKU: 17605036900

Yoshimura - RS-4 Full System (Kawasaki)

Sale price$355.05 Regular price$394.50
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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30

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Description

Yoshimura - RS-4 Full System (Kawasaki)Yoshimura RS 4 Signature Series Full System (Kawasaki) The Yoshimura RS 4 Signature series full exhaust system for Kawasaki has been developed to win races. Adding power throughout the range and providing torque to help the KX250F get out of the gate to grab holeshots, the RS 4 system gives the rider confidence to battle with the best. The RS 4 has also been designed to save weight and add monster performance over the stock system. The unique

Yoshimura - RS-4 Signature Series Full System (Kawasaki)

The Yoshimura RS-4 Signature series full exhaust system for Kawasaki has been developed to win races. Adding power throughout the range and providing torque to help the KX250F get out of the gate to grab holeshots, the RS-4 system gives the rider confidence to battle with the best. The RS-4 has also been designed to save weight and add monster performance over the stock system. The unique Pentagonal-shape sleeve gives your bike that factory look while adding an exhaust note that isn’t loud thanks to the Polyresonant duplex chamber and two staged stepped baffle for increased performance. Adding to the factory look, the RS-4 includes a Stainless Steel header pipe that is durable and is finished off with a Carbon Fiber cone end cap.

For riders looking to shave off even more weight, the RS-4 Signature series for Kawasaki comes in two Titanium versions to match anyone’s factory look. Yoshimura has done it again and offered factory equipment for any rider looking to increase power on their motocross bike.

With years of involvement in professional racing, Yoshimura did not hold back in the development of the RS-4 Signature Series for Kawasaki motocross bikes. From their clean look to their fit and finish, Yoshimura exhaust systems are the built to the highest standards so you don’t have to worry about loss of power at the wrong time.

You can find all your Yoshimura RS-4 Signature Series Full Exhaust systems for Kawasaki at BTO Sports, where we have the best prices and availability for your bike. While this particular offering from Yoshimura is for the 2017 Kawasaki motocross bikes such as the KXF250, we also carry parts for KTM, Yamaha, Honda, Suzuki, and Husqvarna as well. Be sure to check BTO often for the latest dirt bike parts like the Yoshimura RS-4 Signature Series Kawasaki Full System.

 

Features:

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Offered in three models:
  •  - Stainless header, Aluminum can w/ Carbon End Cap
  •  - Titanium header, Titanium can w/ Carbon End Cap
  •  - Titanium header, Carbon can w/ Carbon End Cap

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 17605036900

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Euro2nv
Draper, US
★★★★★ 5
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Size: 7.5, Color: Optical White
These are my 6th pair of Cole Haan shoes and probably my favorite. They're light weight, comfortable, well built, and beautifully designed.
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Reviewed in the United States on February 24, 2026
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marquita provall
Battle Creek, US
★★★★★ 5
True to size
I purchased this suit for my son’s prom. The jacket was a perfect fit but the pants were a little big on him. He loved the jacket. He said that the jacket was comfortable and roomy. We also had to have the arms taken up a little bit. The color and quality were very good!!! I myself loved the design and the material. Very nice.
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Reviewed in the United States on June 30, 2024
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Shirley S.
Port Orchard, US
★★★★★ 5
Prom Must Have
Size: Large, Color: Black, Size: Large, Color: Black
1) Totally affordable compared to ANY rental 2) Prom or Homecoming, maybe a (non high fashion) charitable event type quality jacket. True to size. 3) Pants are likely a 36” length. But otherwise true to size. The quality is great. 4) I ordered according to another review. My son is 5’10” plus a smidge. He’s 180#. Athlete. I ordered a Large. It’s perfect other than the length. He has a twin brother who is the same height but about 20# lighter and would need a medium. Also an athlete. 6) Make sure you order in time for pants length alrerations. 5) Do it. Order it for your event. Save a few hundred dollars and a ton of time returning rentals, those pants can be used again for sure.
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Reviewed in the United States on March 14, 2024
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John soobrian
Waukegan, US
★★★★★ 5
Stylish
Good quality and true fit. Material is pretty good I wore it twice and dry cleaned and still in perfect condition.
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Reviewed in the United States on June 26, 2025
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Capcan
Lowell, US
★★★★★ 5
Great suit!
My man looked soooo handsome in his suit. We ordered this suit at the last minute. It fit perfect. He is 6'3 wears a 38 jean and xl shirt. We were worried about the length of the pants but they perfect and long and the jacket fit perfect! The quality was great and he said he loved the fit and it was spacious. We went to a ball and we leaned and rocked all night and he didnt have to come out of his jacket to do so.
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Reviewed in the United States on July 3, 2024

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