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2009 Kawasaki KFX450R

Yoshimura RS-2 Comp Series Full System Exhaust

Retail: $595.99
You Save: $56.00 (9%)
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In Stock - Ships Today
Have it by April 21st when you order by 3:00pm PST.
FITS: 2009 Kawasaki KFX450R change
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Product Description

Add some fire to your rides with the RS-2 Full System Comp Series exhaust.

  • Stainless construction.
  • New diamond-shape can allows for more packing material creating lower noise.
  • Muffler shape increases durability and performance from muffler packing.
  • 2-stage large race baffle allows optimal performance throughout the RPM range.
  • Full System comes with a stainless steel header and mid pipe.
  • Aluminum muffler sleeve and mount bracket.
  • 2-piece end cap allows for installation of various inserts.
  • Tapered front cap allows muffler mass to be moved forward for better center of mass.
  • Step-by-step directions and all necessary hardware included for an easy installation.
  • Stainless systems come with a 96 db sound insert / USFS-approved spark arrestor installed in the muffler; optional 94 db and 99 db sound inserts available separately.
  • Customer Reviews
  • Ask an Expert
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5.0 out of 5 stars
5 star   18
4 star 0
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1 star 0
1-10 of 18
Location: Columbia, SC, USA

Bought the Rs-2 System for my 09 Yz450F and installed it I have say awesome difference! Had to buy a new exhaust gasket and the stock mid pipe clamp didn't fit the rs-2 so had to buy new. Overall the Exhaust is on point and bike performs well! Had to do a few jetting adjustments but it was excellent. Worth the price

Verified Purchaser
Location: Holbrook, AZ 86025, USA
Best pipe I have ever purchased!!

This pipe has created tons more power to my bike YFZ450100% difference in the Burms while racing the track and sound amazing !!!! I would recommend getting the R2-comp series full system

Verified Purchaser
Location: wv
Great sound

Yosh exhaust are the best for Suzuki have them on both of mine look good sound great and add power. What more could you ask for.drz400s and ltr450.

Yoshimura RS-2 for ltz400

I bought this pipe for my 2005 ltz400. Installation was pretty simple but the mid pipe was touching the frame, but after doing a little adjusting i was able to get so it doesn't touch. Overall the pipe added some decent power, looks sick and sounds good.

Verified Purchaser
Yoshi pipe

great pipe definetly added more power to my yz250f

Location: Sugar Land, TX, USA
Awesome Exhaust

I purchased this exhaust for my YZ250F '06 and I can just feel the difference riding from the stock pipe. I also purchased and installed a 99dB insert for it to help that much more and it has done wonders! I would definitely consider this exhaust for a Yamaha if you are looking for one!

Verified Purchaser
Yoshi exhuast

Great pipe looks sweet too

Verified Purchaser
Location: Paradise, CA
What a difference!

My son wanted a little more kick in his 110. Wow what a difference. Much more power and is quicker. He loves it. And the look is too cool for school.

Top 50 Contributor
Location: cedar creek, tx
Smooth power curve and quiet

The install is easy and the power curve is better then stock exhaust system and make power more manageable on my 2007 Honda CRF 450, also the people I ride with say they can't hear me until I pass them so the system is quieter then the stock system. I would buy the exhaust system again any time I buy a new bike.

Ease of Installation
Location: Fort Worth, TX

i bought this exhaust for an 07 yz250f that really felt like it had NO bottom end. This system really helped it. i would recommend it to everyone. so far its a great system and im really happy with my purchase

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1-10 of 13
Basspolizei 2 months 13 days ago Location: Oklahoma
Does the addition of the Yoshimura exhaust system need further bike help?
I have owned 2 recently made HD's. An ultra and put on Vance and Hines slip on's and it needed a retune. My Night Rod wore some awesome tab slip on's and they said no upgrade needed. So I am completely confused and will never buy another HD! Does the CRF110F need additional work after installing the Yoshimura system? Thanks in advance.
MotoSport Staff Expert
2 months 12 days ago Location: Portland, OR, USA
Normally when switching over to any aftermarket full exhaust system you will have to retune/re-jet for optimal performance. With a slip-on exhaust usually only minor tuning is required. Jetting can be very technical and somewhat tricky. I can't really recommend specific jet sizes for your Honda CRF110 as it would depend on your location (alititude/temperature). I would recommend taking your bike to a shop with a service department to have it re-jetted after the exhaust is installed.
Nick Over 5 months ago Location: Louisiana
I have a 2004 rmz250 and I cannot get the jetting right for this exhaust! I have the full system! What jets should I start with?
I have stage 2 hotcam camshafts and a boysen quick shot 2 accelerator pump.
MotoSport Staff
Over 5 months ago Location: Portland, OR, USA
For jetting specifications specific to your location. Your best will be to call Yoshimura directly and they can provide their recommended jetting specs. Yoshimura can be reached at 1-800-634-9166.
CaptFox Over 5 months ago
What is the weight of this and the RS-2 carbon fiber model?
MotoSport Staff
Over 5 months ago Location: Portland, OR, USA
The weight of the Stainless Aluminum system is 13LBS. The carbon fiber version is about 1/2 LB less.
Adz38 Over 6 months ago Location: Pahiatua, New Zealand
How much for a jet kit and springs kit?
If I'm going to buy this system I also will new jets kit and spring Kit, how much will that cost? Cheers Adz38
MotoSport Staff
Over 6 months ago Location: Portland, OR, USA
Any required springs will be included with the exhaust. The jet kit pricing can be found on their respective pages. We have either the JD jet kits or the FMF Power Up jet kits available for your 2006 YZ250F.
05CRF250RCT Over 8 months ago
Do I have to re-jet with the RS-2 on my 05 Honda CRF250R? If so what would the jetting be with RS-2 on my bike?
MotoSport Staff
Over 8 months ago Location: Portland, OR, USA
The jetting can and will vary depending on your location and what elevation you ride at. For the best recommendation on jetting I would call Yoshimura directly with your location information and they are more than happy to provide jetting specs. Yoshimura can be reached at 1-800-634-9166.
yamaha821 Over 11 months ago Location: Hamburg, PA 19526, USA
Does the yoshi RS-2 Comp series full system include jetting for carb or no jetting needed or what do you need to get?
MotoSport Staff
Over 11 months ago Location: Portland, OR, USA
This exhaust will require re-jetting and it is not included with the exhaust. I would recommend a jet kit or to contact Yoshimura directly to see what they recommend to jet your bike at based on your location. The jet kits will come with a jetting guide to help with the jetting process.
Mmoney Over 11 months ago
I have the slip on can I buy the pipe know?
I also wan to do a fuel box and programmer for the set up. What do u recommend? I noticed there is two modules for this I need both modules?
MotoSport Staff
Over 11 months ago Location: Portland, OR, USA
Unfortunately we do not have the header separately from the full system for the Yoshimura exhaust. There are many fuel programmers to choose from, and offer quite a few variables in set up. Depending on how involved you would like to get with tuning will determine which fuel programmer to go with.
MOTOCROSSHAWAII Over 3 years ago Location: Haleiwa, HI
Does this pipe come with a heat guard.?
odom Over 4 years ago
Do i have to put new jets in my bike?
do i have to put new jets in my bike
MotoSport Staff
Over 4 years ago Location: P+RTLAND
Yes, you will need to rejet your bike.
yz250 Over 4 years ago
Iam I able to take the spark arrestor out and put it back in when needed?
MotoSport Staff
Over 4 years ago Location: Tualatin
yes the spark arrestor is removable
Over 11 months ago Location: Sugar Land, TX, USA
Yes you can but from everything that I have read and heard it is not a good idea due to back pressure and what else. What I did with my pipe is I purchased a 99dB insert and it sounds great. I would look into it if you don't want to keep the spark arrestor in the exhaust.
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