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2012 Kawasaki KLX250S

FMF Powercore 4 Slip-On Exhaust - 4-Stroke

Retail: $299.99
$279.99
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FMF Q4 Spark Arrestor Slip-On Exhaust - 2012 Kawasaki KLX250S FMF Powercore 4 Slip-On Exhaust - 4-Stroke
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FMF Powercore 4 Slip-On Exhaust - 4-Stroke

Product Description

  • Decades of racing development went into the design of the FMF Powercore 4 to improve the power and performance of your dirt bike or ATV at a practical price.
  • The FMF Powercore 4 is a muffler that will boost power and torque throughout the power range, making the Powercore 4 usable for all types of riding.
  • FMF designed a Hi-Flo end cap and core for the Powercore 4 to increase power by creating a free flowing end cap and a core that allows room for exhaust pulse. This results in a consistent power curve.
  • The FMF Powercore 4 uses and advanced cross-weave packing that is more durable then the traditional packing. The cross-weave packing also keeps the Powercore 4 at a reasonable sound level by dissipating the exhaust sound.
  • FMF constructed the Powercore 4 using aluminum to keep the weight down with stainless steel components for extended durability.
  • The FMF Powercore 4 includes a USFS approved spark arrestor.
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(40)
4.9 out of 5 stars
5 star   35
4 star   5
3 star 0
2 star 0
1 star 0
punchdog Location: Springfield, MO, USA
1-10 of 40
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Verified Purchaser
Location: Springfield, MO, USA
Love it

it was easy to install and sounds great. can feel the power difference

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Verified Purchaser
Location: Everett, WA, USA
Power Core 4 for DR 350

I didn't get a chance to use the muffler because it did not fit the header pipe on my bike. The return procedure was quick and painless.

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Location: East Waterford
Great buy.

Instalation was a breeze. Increased top end and smoothed out the power over all on my CRF450R.

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Location: Truckee, CA 96161, USA
Great Buy

Put this pipe on my CRF250X, easy to install, sounds great, gave good power, and looks waaaaaay better than the stock pipe, best pipe i could find for the buck! If you are hesitant... don't be!

CRF250X
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Location: Randle, WA
Great Product

Put this on my crf450x 2005 and it sounds great and noticeable power change.

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Verified Purchaser
Location: South Florida
Awesome

This FMF pipe absolutely woke my 450 right up! Fit perfect and sounds great

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Location: Lake Elsinore, CA, USA
Added power at a great price

FMF did a nice job with this exhaust. It looks great, sound awesome, and really adds a lot to the bike. The added horsepower was noticed right away and it also come with the spark arrestor end cap. It's the best value out there for a slip-on!

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Location: Spanaway, WA, USA
2013 raptor 250

It went on easy, sounds great FMF has stepped up their game and really improved there products.

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Top 500 Contributor Top 1000 Contributor Verified Purchaser Top 100 Contributor Top 250 Contributor
Location: Edgewood, NM 87015, USA
Great Product

I bought the FMF Powercore for a 2013 KX450, because of the spark arrestor to be able to ride in the woods, and the price. The Powercore bolted on easily and matched the stock header perfectly. Once fired up, the sound was much quieter. Took to the woods, and difference in power delivery was amazing, the pull just seemed smoother from the bottom to the top. The spark arrestor did not seem to reduce power at all.

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Doesnt really fits !!

I bought two exhausts, one for my yamaha wr 250 and it works awesome! and for a kawasaki. but here it says that it fits to a kawasaki KLX450R and it doesn't really fits! it's impossible to adapt, hopefully, i m going to sell it, but i just wanted to say that please refresh and update all those factors to be sure when buying more stuff!! because now im not sure if my next buy will work! thank you very much

1-10 of 40
1-10 of 59
nick 6 days 4 hours ago
Fmf for yz450f?
Right now i have a Q4 on my bike. Would i have to re jet my carb with this pipe?
Slick 7 days 23 hours ago Location: Virginia, USA
Will it increase and smooth out the power band?
I own a Honda CRF 230F, just the standard trail bike nothing special, will this exhaust really help with power or am I wasting my time? I don't really want to race the bike I just want more power than stock and maybe a little sweeter exhaust note.
MotoSport Staff Expert
7 days 23 hours ago Location: Portland, OR, USA
Yes, this slip on give your Honda CRF230F a bit more power as well as a deeper sounding tone. Overall I would say this would be a great choice for what you are looking for.
DaveDaFox 11 days ago Location: Christmas Valley, OR 97641, USA
I have 2004 yfz 450. I wanted to know if the mid pipe is adjustable or if is solid?
Expert MotoSport Staff
11 days ago Location: Portland, OR, USA
For most applications the midpide is connected to the Muffler with Springs so that it can be slightly adjusted when mounting, if necessary.
yz802 20 days ago Location: reading
I have a 2013 YZ 250F. do I have to change the jetting at all?
MotoSport Staff Expert
16 days ago Location: Portland, OR, USA
Normally when installing a slip-on only minor jetting changes are needed, if any at all. If you bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary.
Yamaha5656 24 days ago Location: Pa
I have a raptor 350 what size jet would I need for this pipe and the power bomb head pipe?
Expert MotoSport Staff
24 days ago Location: Portland, OR, USA
There is not a specific setting I could give you for jetting your bike. It would really depend on your location (altitude/temperature) and how your bike is running with the current jetting. Jetting can be very tricky, there isn't one setting that will work everywhere with every bike. I would recommend taking your bike to a motorcycle with a service department to have it properly jetted.
Top 100 Contributor Top 250 Contributor
24 days ago Location: Edgewood, NM 87015, USA
If your jetting is correct with the stock pipe, you shouldn't have to re-jet. The FMF system will just make it run better.
Will 26 days ago Location: Edmond, OK, USA
Will this pipe increase my performance on my KLX 140 L?
MotoSport Staff Expert
26 days ago Location: Portland, OR, USA
Yes, you should feel a noticeable gain in performance using the FMF Powercore Slip-On on your Kawasaki KLX140L.
Top 250 Contributor Top 100 Contributor
24 days ago Location: Edgewood, NM 87015, USA
It will improve performance significantly if you are currently running the stock system.
stun 1 month 10 days ago
Does this pipe come with a built in mid pipe?
Expert MotoSport Staff
1 month 1 day ago Location: Portland, OR, USA
That would depend on the bike the exhaust is made for really. For most applications yes, the mid-pipe is included with the Muffler. There are some KTM models that do not require a mid-pipe on the slip on as the header extends the length of the mid-pipe.
Top 100 Contributor Top 250 Contributor
24 days ago Location: Edgewood, NM 87015, USA
the FMF Powercore is just the silencer part. You can get the header if you order the whole system.
Diesel399 1 month 13 days ago
I was wondering if the slip on exhaust will fit my Yamaha TTR-225?
MotoSport Staff Expert
1 month 12 days ago Location: Portland, OR, USA
Yes, This FMF Powercore 4 is made to fit the Yamaha TTR225. Just be sure to correctly select your Year/Make/Model as the bike you are shopping for so we can send you the correct exhaust for your bike.
Top 250 Contributor Top 100 Contributor
1 month 11 days ago Location: Edgewood, NM 87015, USA
Yes, there is an FMF Powercore for the TTR 225. When you order it include the year and model of your bike.
Debbie 1 month 16 days ago Location: Oregon, USA
Do u need t jet the carb if u use the FMF powercore 4 slip-on ?
1 month 16 days ago Location: New York, NY, USA
No you don't need to jet the carb
Top 250 Contributor Top 100 Contributor
1 month 15 days ago Location: Edgewood, NM 87015, USA
Not if your current jetting is correct.
Expert MotoSport Staff
25 days ago Location: Portland, OR, USA
Normally when installing a slip-on only minor jetting changes are needed, if any at all. If you bike is currently jetted properly you will likely not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the bike to see how it is running then tuning your carburetor from there if necessary.
wiss 1 month 20 days ago
Midpipe?
ive never bought exhaust for any of my ATVS or dirtbikes but im buying one for my new bike but im also buying the fmf powerbomb header also but neither of these two say they have a midpipe included do I need to buy a different setup or what am i to do?
MotoSport Staff Expert
1 month 20 days ago Location: Portland, OR, USA
The FMF "Slip-On" would include the midpipe so all you would need to order is the Slip-On and any FMF headpipe for your bike and you will be all good to go! Please feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order!
Top 100 Contributor Top 250 Contributor
1 month 11 days ago Location: Edgewood, NM 87015, USA
FMF sells the silencer/spark arrestor only, or the entire system which includes the header and the silencer. Search it by bike model and year.
1-10 of 59

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