FMF Gnarly 2-Stroke Pipe

FMF Gnarly 2-Stroke Pipe
FMF Gnarly 2-Stroke Pipe

$224.99 - $251.99
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Item #FMF00E5

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48 Reviews
4.7 out of 5 stars
5 Star   45 4 Star   8 3 Star   0 2 Star   1 1 Star   1
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All Reviews
Strokeoftwo Verified Purchaser
Oakhurst CA.
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Single best performance part my bike has

Currently ride a 2002 cr 250. This pipe turned my bike into a tractor.
Can lug the thing for days and it still lifts the front tire no problem. Have riden two strokes most of my riding career and have always ran fmf exhaust so I had no doubt this would be good, but this thing is great.

JAM15
Bristol, VA, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Can't go wrong with FMF

I bought this pipe for my 07 RM 250. I use this along with a FMF Shorty silencer. This was actually bought to replace the exact same pipe. I have always ran the FMF Gnarly on my bike and it performs excellent. The low end power really came alive after installing this pipe and I don't think the top end lost any power at all. With this pipe, my power band hits like Mike Tyson. There was a small learning curve at first but within about 20 minutes I felt comfortable again. I mainly ride on woods trails and this pipe is perfect for that. Like any 2 stroke expansion chamber, this thing really sticks out and takes a lot of abuse when the bike is wrecked. Like I said, I bought this as a replacement for the exact same pipe as I cracked my FMF pipe this past weekend riding on a motocross track in Eastern Tennessee. I really didn't wreck super hard but this wasn't the first time I wrecked on that same side so it is possible that I just kept hitting that same spot until it became really weak and finally cracked. I'm not too upset though. Until this weekend, the pipe performed flawless

Motoparty MotoSport Staff
portland or
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Breathed a whole new life to my KDX200

She's a beast now! Really opened her up. Lots more power and throttle response. Checked the FMF site for jet suggestions and all I have to do was swap out the carb needle. Love the new pipe. Every two stroke should have one!

John Verified Purchaser
Nort Carolina
Ease of Installation 4/5
Gnarley

Bought the Gnarley after the stock pipe on my 2016 Husq TE300 got dinged up pretty bad. This pipe makes power down low. I road one exclusively on my previous bike as it came with it used (EXC 300 KTM from 2005).

My Husqvarna already had lower end power, but the new pipe seems to allow me to run 3rd gear more on the tigher trails I ride as opposed to 2nd gear. Churns out more power in 3rd and does not stall (I lug my 300 mainly, but do get on the pipe on occasion).

Good looking pipe and should take more abuse than the stock pipe due to the thicker diameter steel.

PDXDK Top 25 Contributor Verified Purchaser
Gresham, OR
Durability 3/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
FMF Gnarly 2-Stroke Pipe

If you are looking for a bottom end pipe, look no more. This thing pulls like a freight train out of the bottom end. I love it!

maddog
Flagstaff, AZ, USA
Durability 4/5 Ease of Installation 2/5 Performance 4/5 Power 4/5 Style 4/5
1988 cr500

I been riding and working on these older bikes since I was a kid. This pipe was a tough install. Had to bend the pipe slightly to align the mounting bolts. When I got the pipe it was already scratched. My guess is it was in the shop awhile because the bike is older and not many are sold for a 88 cr500. But still it should have looked better than that. I matched it up with the fmf powercore and they work well together. I did notice my bottom end power hit hard throughout the power band. The pipe would have scored high I'm sure if it wasn't going on an antique. lol Overall, better than stock and would buy again because there is a positive increase on the bikes performance. However it should be $180 bucks.

Nate Verified Purchaser
Covington la
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Love it

It's really durable and think about how much cooler your bike will look with that fmf gnarly imprint.

2stroker
Connecticut
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
FMF GNARLY

this pipe fitted with a shorty silencer and rekleuse clutch is the bees knees for woods riding my RM 250

Zachatk1 Top 250 Contributor Verified Purchaser
Jamesville, NY 13078, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Excellent choice for woods/harescramble racing

Bike is a 2014 KTM 250SX setup for woods racing: OS tank, flywheel weight, geared 13/50. We were using a Factory Connection Platinum 2 which is a great pipe for MX but it lacked the mid-range power. This pipe provides near perfect power delivery using a Lectron carb and Boyeson reeds. The fitment of the FMF is way better also, in fact it fit perfectly. The FC pipe(we have 2) have always been more of process to install.

KTMSquid Top 1000 Contributor Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Awesome

Makes the KTM250sx like a tractor when paired with the mild PV Spring. The thing lugs without losing the quick power available on a two smoker.
Better low end, mid,
And top remained about the same.

Finish is durable, and the thicker steel makes for a better pipe. Took a digger that would've put a huge dent in the stocker, and I'm left with a small (dime sized instead of fist sized) ding.

Seals up better than the stocker. Only issue was having to zip tie the rubber sleeve between pipe and silencer. The fit was either just a little looser, or the sleeve got stretched putting the new pipe on/old pipe off.

TheHammer Verified Purchaser
Picacho, CA 92283, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Gnarly torque

The pipe fits great and you can really feel the difference in the bottom end torque, I paired it with an FMF Q Stealth spark arrestor silencer.

MileHiMike Verified Purchaser
Denver
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Great Service

I purchased this exhaust to replace a damaged ProCircuit pipe that was on the bike when I bought it. To be honest, the mounts for the FMF Gnarly didn't line up with my 1999 CR500AF, because it has a non stock, CR250 Aluminimum Frame. I called Motosports to discuss the issue and they were very knowledgable and willing to help. Turned out that I simply removed the mount on the FMF Gnaly, and the pipe fit really well without it. My point here is that the guy at Motosport was very helpful and willing to help, even though I didn't need it. Thanks for your help and service Motosport.

Original ProCircuit mount
Lucky Verified Purchaser
Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Gnarly pipe

Best pipe I've ever used and I race so I fully recommend this pipe!

FMF Gnarly 2-Stroke Pipe
TheHareScrambler Top 1000 Contributor
Indiana
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Best for the woods

with this pipe some new reeds, and proper jetting the old Honda feels like a ktm 300 and will out pull almost any 450f for the hole shot. the low end grunt is astounding. just dump the clutch and ride a low rpm wheelie up any hill.

Keith Verified Purchaser
WV
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Power 4/5 Style 5/5
Gnarly for 300xce

This pipe works well to add a little grunt to your bike. It is not huge gains but it does allow me to carry a higher gear up hills at lower speeds to reduce wheel spin. This is what I was trying to achieve with the installation of this pipe. I coupled it with Shorty silencer for maximum effect as suggested by FMF technical support.

FMF Gnarly 2-Stroke Pipe
Ktm250sx Verified Purchaser
Gainesville, FL, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great pipe

Added bottom end power that I was looking for and is more durable than stock. The gnarly paired with the turbine core 2 helped my bike in the woods tremendously.

DM794 Top 100 Contributor
Ocala, FL, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
2005 Yamaha YZ 250

The pipe is very well built and will hold up great under extreme conditions. It mounted up nicely and the bottom end power was greatly increased, and it looks great too.

vador Verified Purchaser
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Power 5/5 Style 4/5
Gnarly 2014 ktm 300

Great low end power, put red spring on power valve and still have great hit if you want.

Kale Verified Purchaser
Bayamon, Puerto Rico
Durability 4/5 Ease of Installation 5/5 Performance 4/5 Power 5/5 Style 5/5

Excellent torque to enduro

Scott141 Verified Purchaser
Lander, WY 82520, USA
Durability 4/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 4/5
Fmf gnarly2 - stroke pipe

I have not had a chance to ride because of the snow but it is replacing a gnarly that was on the bike , but it got damaged from rocks during a race. I really like how it preforms on the bike. I think the combination of the pipe and a rear tubliss tube makes the traction just amazing.

See 20 More Reviews
25 Questions
Answered:   24
Not Yet:   1
Lotcroc
Location: Jonesboro ar
Q: 1998 cr 250 two stroke?
3 months 9 days ago
Gnarly pipe and shorty silencer 14/51 gearing what would the Power be like
Phil
Q: Will the FMF Gnarly fit with the stock silencer?
Over 7 months ago
MotoSportExpert
MotoSport Staff Expert
Over 7 months ago
A: You shouldn't have a problem running the FMF Gnarly pipe with the stock silencer.
lovemyktm
Location: Aust
Q: Is it necessary to rejet / adjust the carbie after fitment to get this lower rpm power?
Over 9 months ago
MotoSportExpert
Expert MotoSport Staff
Over 8 months ago
A: Yes. You should always properly tune your bike after getting an aftermarket exhaust to allow it to run at its optimal level and give you the most performance. Failure to properly tune your bike will void your warranty.
Due to the variations that may come into effect when tuning an engine (i.e. pipes, intake, altitude, cams, displacement, standard or high compression pistons, etc.) we CANNOT offer jetting recommendations.
HwKennedy
Over 8 months ago
A: You would have to adjust the jetting to compensate for this pipe-if you don't then it probably won't run smoothly.
Blake
Location: Alabama, USA
Q: I have a 2013 ktm 250sx with a FMF shorty silencer on it with stock exhaust. Will the gnarly pipe bolt right up to the shorty silencer? And also what?
Over 9 months ago
MotoSportExpert
MotoSport Staff Expert
Over 9 months ago
A: Yes, you would have not problem matching the FMF Gnarly with the FMF shorty silencer. FMF designs their pipes to fit with their silencers.
Stevie
Location: Leander, TX 78641, USA
Q: I have 2000 kx 250 2 stroke already have the powercore 2 silencer. Will that silencer match up with the gnarly pipe and fit this bike.?
Over 9 months ago
I have the FMF sst pipe now and the powercore 2 was to big (long) and did not fit with this pipe. I want to get the pipe that will fit with this silencer. (powercore 2)
MotoSportExpert
Expert MotoSport Staff
Over 9 months ago
A: Yes, FMF designed its pipes to fit FMF silencers.
Timothy
Q: Does this ship with new O ring gaskets?
Over 11 months ago
MotoSportExpert
MotoSport Staff Expert
Over 10 months ago
A: You would be able to use the same O-Ring Gaskets as the OEM pipe uses. The O-Rings for your pipe can be found in the OEM parts section.
http://www.motosport.com/dirtbike/oem-parts
Jordan
Location: Allentown, PA, USA
Q: Will this affect the top end or the power band negatively?
1 year 2 months ago
MotoSportExpert
Expert MotoSport Staff
1 year 2 months ago
A: The Gnarly gives maximum low-end boost without sacrificing top end power.
Ktm250sx
1 year ago Location: Gainesville, FL, USA
A: I did not notice any top end power loss at all but did notice better bottom end grunt.
Abee
Q: Will this fit my 97 kx250 ? And what kind of adjustments would I have to do after installing?
1 year 3 months ago
MotoSportExpert
MotoSport Staff Expert
1 year 3 months ago
A: Yes. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct pipe for your bike. Jetting changes would likely be needed. . 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 local motorcycle dealership’s service department to have your bike properly jetted. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Dalton
Location: Colorado Springs, CO, USA
Q: Cr250 2001 fmf gnarly and fmf shorty combo?
1 year 10 months ago
So I have a cr250 2001 and I already have the gnarly and I also have the turbinecore 2 silencer, would the shorty and gnarly be good combo for the track and how is the sound. Thanks for all the answers, and good products and fast shipping, you guys are the best.
MotoSportExpert
Expert MotoSport Staff
1 year 10 months ago
A: The FMF Gnarly pipes have been developed and tested for the off-roader in mind. With thicker 18g steel construction, it will take the punishment you can throw at it. This pipe will shift and increase the power band so that it comes on sooner, pulls harder through the mid and smoothes out the high RPM surge. This was once called the FMF Torque pipe, but it did not include the thicker steel construction.
There are a few differences between the shorty and standard length silencers depending on the model. Remember though, with 2-stroke tuning what you might consider a slight/small change has the potential of being a lot bigger than one might think. With the shorter length can and altered core size, FMF decrease the amount of backpressure in the muffler, which on a 2-stroke will increase throttle response and low to midrange power. Some models may see a slight decrease in over-rev though with the Shorty. The Shorty will give you more throttle response and low end power. Because it's smaller you'll see even more weight savings and a louder sound level.
Dalton
Location: Colorado Springs, CO, USA
Q: Will this pipe be good with a fmf short?
1 year 10 months ago
I already have this pipe and i have a turbinecore 2 silencer. Will this pipe be good for the track and the fmf shorty, and whats the diffrence between a fmf shorty and a fmf shorty silencer thx
MotoSportExpert
MotoSport Staff Expert
1 year 10 months ago
A: The FMF Gnarly pipes have been developed and tested for the off-roader in mind. With thicker 18g steel construction, it will take the punishment you can throw at it. This pipe will shift and increase the power band so that it comes on sooner, pulls harder through the mid and smoothes out the high RPM surge. This was once called the FMF Torque pipe, but it did not include the thicker steel construction.
There are a few differences between the shorty and standard length silencers depending on the model. Remember though, with 2-stroke tuning what you might consider a slight/small change has the potential of being a lot bigger than one might think. With the shorter length can and altered core size, FMF decrease the amount of backpressure in the muffler, which on a 2-stroke will increase throttle response and low to midrange power. Some models may see a slight decrease in over-rev though with the Shorty. The Shorty will give you more throttle response and low end power. Because it's smaller you'll see even more weight savings and a louder sound level.
Kyle
Over 11 months ago Location: Zoar, Oh
A: I have a yz250 with a shory and it makes it sound hardcore! Nice smooth rasp everytime you punch it. When its idleing it sounds like ping ping ping ping
1-10 of 25
Fitment
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# Part Numbers
Product Variant Manufacturer Part #
FMF Gnarly 2-Stroke Pipe 020379
FMF Gnarly 2-Stroke Pipe 021007
FMF Gnarly 2-Stroke Pipe 021041
FMF Gnarly 2-Stroke Pipe 020027
FMF Gnarly 2-Stroke Pipe 020028
FMF Gnarly 2-Stroke Pipe 021053
FMF Gnarly 2-Stroke Pipe 020024
FMF Gnarly 2-Stroke Pipe 020026
FMF Gnarly 2-Stroke Pipe 025143
FMF Gnarly 2-Stroke Pipe 020080
FMF Gnarly 2-Stroke Pipe 025085
FMF Gnarly 2-Stroke Pipe 025087
FMF Gnarly 2-Stroke Pipe 020084
FMF Gnarly 2-Stroke Pipe 025131
FMF Gnarly 2-Stroke Pipe 025070
FMF Gnarly 2-Stroke Pipe 020083
FMF Gnarly 2-Stroke Pipe 025004
FMF Gnarly 2-Stroke Pipe 025023
FMF Gnarly 2-Stroke Pipe 020079
FMF Gnarly 2-Stroke Pipe 020082
FMF Gnarly 2-Stroke Pipe 020078
FMF Gnarly 2-Stroke Pipe 020081
FMF Gnarly 2-Stroke Pipe 022007
FMF Gnarly 2-Stroke Pipe 022016
FMF Gnarly 2-Stroke Pipe 022041
FMF Gnarly 2-Stroke Pipe 020058
FMF Gnarly 2-Stroke Pipe 020059
FMF Gnarly 2-Stroke Pipe 022053
FMF Gnarly 2-Stroke Pipe 020038
FMF Gnarly 2-Stroke Pipe 020391
FMF Gnarly 2-Stroke Pipe 023060
FMF Gnarly 2-Stroke Pipe 020110
FMF Gnarly 2-Stroke Pipe 020156
FMF Gnarly 2-Stroke Pipe 024054
FMF Gnarly 2-Stroke Pipe 020025
FMF Gnarly 2-Stroke Pipe 025152
FMF Gnarly 2-Stroke Pipe 020056
FMF Gnarly 2-Stroke Pipe 020155
FMF Gnarly 2-Stroke Pipe 025010
FMF Gnarly 2-Stroke Pipe 025148
FMF Gnarly 2-Stroke Pipe 025203
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