Yoshimura RS-4 Full System Exhaust

Yoshimura RS-4 Full System Exhaust
Yoshimura RS-4 Full System Exhaust

$521.99 - $895.50
10% Off - Save up to $99.50

Description See Also: 10 Reviews 7 Questions Fitment
Item #YSH0004

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10 Reviews
4.7 out of 5 stars
5 Star   9 4 Star   0 3 Star   0 2 Star   1 1 Star   0
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All Reviews
CamUSMC Verified Purchaser
Would HIGHLY recommend to anyone!

I would highly recommend this exhaust to anyone wanting to get more solid power, better looking, and the sound! Is amazing! I recently compared the FMF 4.1 with my 2012 Rmz250 and the Yoshimura RS-4 and in my opinion for the many years I've raced I would recommend Yoshimura any day over an FMF. Pro circuit and Yoshimura I've both experienced with 2 stroke and 4 stroke bikes and both brands NEVER disappoint! As always love the support and great service of Motorsport.com wouldn't order from anyone else!

Jmarkel475 Top 250 Contributor Verified Purchaser

Cant go wrong with Yosh. Best exhaust for hondas 4 stroke moto bikes.


I love this product it sounds better and performs great! I put this on my YZ250F. I recommend this it's great!

Erik8770 Verified Purchaser
Pittsburgh Pa.

Very happy with my purchase from Motor Sport's.

Honolulu, HI, USA

Fits perfect for a 2015 WR450F, easy installation. Great sound and outstanding power. Very responsive, I could keep my front light when needed to on the trails. The exhaust came with a cool Yoshimura plug and some stickers :)

don90 Verified Purchaser
Costa Rica
Badass sound and look, period.

Intermediate vet, rmz250 2015, did one heat with stock, then replaced it with yoshi and did another heat; no gains in time. Had to use a leaner coupler with yoshi, with the stock one was slow.
My impression is the besides the badass look and sound there is very little difference compared to stock; I felt imrovment in hi revv but less low-mid range.
Very easy to set and to remove; I put the stock back and I have the yoshi for sale now.

honda917 Verified Purchaser
Good buy

fit great on my 2012 crf 250 sounds great Bike revs faster the head pipe is the same as stock with out the heat shield so save some money and get the slip on system

slaven13 Top 1000 Contributor
Sick as heck!!!!!!

this full exhaust system is da stuff!!! quick & easy to put on! sounds very nice! and omgosh power everywhere now! comin out of a turn and pinn the throttle your front tire will be lifting up!!! GREAT PIPE!!

Kopperston WV
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Even touchier throttle response

power increase and even touchier throttle response from top to bottom, my RMZ250 now sounds more like a 450, revs longer in 5th and brings front wheel up in higher gears when needed, very tight fit under side panels but no problem, first after market pipe that I have ever bought that actually gives noticeable power increase with installation, awesome pipe, awesome results

Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome Exhaust Upgrade for the CRF450R

Awesome Exhaust for New CRF450R ! The sound is better and not as loud as stock minus a few decibels.The power is better and looks sick on bike.

7 Questions
Answered:   6
Not Yet:   1
Location: Orange, TX, USA
Q: Accessories?
3 months 22 days ago
Honda 2013 CRF250L , is Air Box modification kit and Stay brackets for header pipe heat shield available? Also, is Dealer re mapping / re jetting recommended ?
Q: Come with header?
1 year 1 month ago
It says full exhaust system, but says nothing about a header.
MotoSport Staff Expert
1 year 1 month ago
A: Yes. Durable high-grade stainless steel tapered header and mid-pipe.
Q: I have this exhaust for a 2010 crf250r. Will it fit a 2012 crf250r?
1 year 8 months ago
Expert MotoSport Staff
1 year 8 months ago
A: No the Yoshimura RS-4 Full System Exhaust from your 2010 Honda CRF250R would not fit the 2012 CRF250R.
Location: quebec
Q: How many db with a yz450f ?
1 year 12 months ago
MotoSport Staff Expert
1 year 11 months ago
A: Sound For: 2012 YZ450
OEM: 96.0 dBA 99.1 dBA
Yoshi w/ AMA sound insert: 95.8 dBA – dBA - Installed
Yoshi w/ Spark Arrester: 95.8 dBA 98.1 dBA - Optional
Q: Does the comp 4 come with the carbon fiber tip on it on a 2009 crf 450?
Over 7 years ago
MotoSport Staff Expert
Over 6 years ago Location: Portland
A: Yes, this does have the carbon fiber end cap.
Q: What is the difference between this and the rs2??
Over 7 years ago
Over 7 years ago
A: the RS4 is for the new 09 and 2010 Honda's. The picture shown is wrong for and RS4. I told motosport this along time ago when i orders my RS4. On a different note the system is fabulous on a 2009 crf 450r
Top 25 Contributor Top 10 Contributor
Location: Mays Landing, NJ
Q: Is that the correct exhaust in the picture?
Over 7 years ago
MotoSport Staff
Over 7 years ago Location: P+RTLAND
A: This is just a general product picture supplied by Yoshi. So the exhaust may vary from the picture depending on what bike you have.
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