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FMF Powercore 4 Spark Arrestor Complete Exhaust With Stainless Hi-Flo Header
FMF Powercore 4 Spark Arrestor Complete Exhaust With Stainless Hi-Flo Header

$215.99 - $224.99
10% Off - Save up to $25.00

Item #FMF001D

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10 Reviews
4.9 out of 5 stars
5 Star   9 4 Star   1 3 Star   0 2 Star   0 1 Star   0
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All Reviews
New Hampshire
Amazing pipe

It’s a great exhaust. Makes the bike sound a lot better than stock and will rumble everything around you. I ride my trails every 2 weeks or so and my neighbors across my neighborhood can here it. I just have one question, what size jet do I need? It’s a 2018 crf125f and running lean

Verified Purchaser
Molalla Or
Perfect addition to the bike

I bought his for my wife’s TTR125 and I her or I couldn’t be happier. Easy to install and changed the tone of the bike without making it obnoxious. Good pipe!

Verified Purchaser
Millerstown, pa
Great little exhaust.

The exhaust was a direct fit to our 2003 Ttr 90. Installed in about 15 minutes. The only downfall we found was we needed a different jet for where we live. Increased the performance from the exhaust.

Verified Purchaser
Colorado Springs, CO, USA
Amazing amount of power

Not only does this exhaust system sound nice, it added an amazing amount of power to my son's bike. He has a Yamaha ttr-50 and I wanted to give it a little more power on the hills. Well it accomplished this and more. Added a ton of torque in the low end. He has not gotten stuck on a hill since. Also very easy to install. My 4 year old son practically did it himself, with just a little guidance from me. Highly recommended!

Verified Purchaser
Excellent purchase

The product has lived up to it's description. Very happy with it and the delivery came before expected.

Verified Purchaser
Mountain Home, AR, USA
Good pipe.

My sons bike is used for both trail riding and racing, so this is a good pipe for both since it has the spark arrester. Easy to put on and the primary heat shield bolted right up.

Verified Purchaser
Flint, MI, USA
Fmf power core 4

I ordered the fmf power core 4 for my 02 yamaha ttr125l and fit great and sounds awesome. Definitely recommend to everyone there customer service is hands down helped me with all questions before I ordered thanks a lot

Verified Purchaser

Verified Purchaser

Great pipe

Got this for my kx 250f fit great, sounds great

14 Questions
Answered:   13
Not Yet:   1
Q: Can someone Give me a lesson about jetting? I have a 2018 crf125f and it’s running lean. Does anybody know what size jet I would need to balance it out? Thanks
21 days ago
Top 100
21 days ago
A: You Should contact JD Jetting their Phone Number is 360-350-0557.
Q: How loud is fmf on a 4 stroke ?
22 days ago
Top 10
22 days ago
A: The engine noise will vary depending on the make/model. There are several types of FMF pipes, this is just one of the many.
Q: Will this make my crf125f faster and improve the performance of my bike
1 month 29 days ago
Top 500
1 month 29 days ago
A: This exhaust will improve the performance of your bike. However, you may need to change the stock jetting to maximize performance.
Q: What is louder fmf powercore 4 or pro circuit t4
2 months 21 days ago
Top 10
2 months 21 days ago
A: There isn't a decibel level test comparing both exhaust. Both will create a nice thump compared to stock!
Q: My exhaust is on the left but the picture shows it on the right side. Will it work? What is louder fmf or pro circuit?
2 months 26 days ago
Top 10
2 months 26 days ago
A: Both exhaust systems are louder than stock. If you profile your specific machine, you will be sent the exhaust that is a direct replacement for your stock exhaust.
Q: My 2018 ttr 125 had the exhaust on the left side but the picture shows it on right. So I don't know if it will work. Also what is louder fmf or pro circuit?
2 months 26 days ago
Top 25
2 months 26 days ago
A: The photo is just for reference, this will indeed fit your 2018 TTR125. As far as sound goes its going to depend on which model FMF and Pro Circuit you are comparing.
Q: What size is the header?
Over 7 months ago
Top 10 Contributor
Over 7 months ago
A: header sizes and dimensions will depend on the model of bike selected.
Q: Will this fit a 2015 CRF 110F?
1 year 9 months ago
Q: Would one of these bolt on to my sons 2015 ttr50 ?
2 years 9 months ago
MotoSport Staff Expert
2 years 9 months ago
A: Yes the FMF Powercore 4 Spark Arrestor Complete Exhaust With Stainless Hi-Flo Header fits your 2015 Yamaha TTR50. 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 exhaust for your bike. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
FMF Powercore 4 Spark Arrestor Complete Exhaust With Stainless Hi-Flo Header
2 years 9 months ago
A: Yes. These are engineered to fit on the TTR-50s. I purchased one for my son's and it works great. Easy to install, my 4 year old son practically installed it himself.
Q: We just installed this exhaust on my sons 2013 TTR125 and looking for advice on jetting. Any recommendations on what size jets would be best?
Over 3 years ago
Top 1 Contributor
Over 3 years ago
A: 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 local motorcycle dealership’s service department to have your bike properly jetted.
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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Aluminum 041502
Aluminum 040071
Aluminum 040011
Aluminum 041179
Aluminum 040070
Aluminum 044157
Aluminum 044273
Aluminum 041534
California Proposition 65

WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to