Yoshimura - RS-4 Full System (Kawasaki)
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 9 - Jul 14

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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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D
Dizzle
Cuba, US
★★★★★ 5
Nice kids suit
Size: 5, Color: Light Blue
This is a nice way to play up your son's sophistication. It is a linen suit, but isn't a true linen. It is a blend of linen, polyester and spandex, which isn't a bad thing for kids since it has a softer feel. Sizing was accurate. I'm looking forward to when he can wear this to a formal occasion.
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Reviewed in the United States on October 24, 2025
S
SUGAR
Whiting, US
★★★★★ 5
A suit I ABSOLUTELY love ☺️
Size: 14, Color: Lilac
This 3 piece suit is one of our FAVORITES! I firstly love the color which isn’t one I had seen very often and it’s not to bright, rather more neutral and formal. The suit is of luxury grade and standard with the matching durability along with perfect stitching from buttons to seams. The suit came with 3 flawless pieces (blazer, slacks, and vest) all of which are true to size, well fitting, low maintenance, and very comfortable. I couldn’t think of a better special occasion suit or gift, and I HIGHLY recommend ⭐️⭐️⭐️⭐️
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Reviewed in the United States on November 6, 2025
A
Angel
Alexandria, US
★★★★★ 5
Such a nice suit!
Size: 14, Color: Beige
I was pleased upon getting this suit for my son. I really like the color, which is kind of like an oatmeal color. Nice and light color. The material is light and thinner, but very comfortable. It fit my son really well. It’s not lined or the best quality suit, but because it is a linen suit, it works out and look really good. I would recommend this one, especially for more of the summer/spring time.
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Reviewed in the United States on October 28, 2025
J
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JMommy
Houston, US
★★★★★ 5
Great vest
Size: 12, Color: Black
Great vest. I love the slim fit. It looks very nice on my son, not baggy or boxy looking like some vest. My son has used it for several occasions including a wake, a Beta Club induction, awards day, and soon his graduation celebration at church. The quality and material are good. Definitely worth what I paid.
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Reviewed in the United States on May 29, 2026
K
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Katy
Los Angeles, US
★★★★★ 5
Elegant Color and Very Well Made Vest
Size: 14, Color: Light Grey, Size: 14, Color: Light Grey
The vest is really nice and great quality, but it does run a little smaller than expected. I would suggest sizing up if you want a more comfortable fit. Other than that, it looks very sharp and well made.
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Reviewed in the United States on April 24, 2026

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