FMF – Keefer, Inc. Tested

Living With The 2023 KTM 125SX

Written By: Gardner Tarlow 125s, To Inject Or Not To Inject? When Kris offered to let me test the 2023 KTM 125 SX FI machine, I was more than stoked to get the opportunity to compare KTM’s new 125 FI to some other well carbureted 125s. With that being said, I would have been even more…

ByKris KeeferJune 26, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance

FMF 4.1 Stainless Muffler System (2023 Kawasaki KX250)

The Kawasaki KX250 has undergone some significant engine changes for 2023 and that sparked FMF to make an update to their 4.1 muffler system. The 2023 Kawasaki KX250 engine character has more low end grunt as well as pulling power than last year’s model but it still isn't quite as good as the Yamaha in…

ByKris KeeferDecember 1, 20220Comments

Bike Brands Yamaha

2022/2023 Yamaha YZ250F Top 5 Mods

The Yamaha YZ250F is unchanged for 2023 so these five mods below will work for the 2022 and 2023 model. If you’re looking for a baseline suspension setting you can click this link: https://pulpmx.com/2021/09/26/2022-yamaha-yz250f-baseline-settings/ . These mods below drastically changes the way the YZ250F runs as well as handles as each improve an already great…

ByKris KeeferOctober 6, 20220Comments

Bolt-Ons Exhaust Hard Parts Husqvarna

To Slip On Or Not To Slip On? FMF 4.1 Slip On Muffler (2023 Husqvarna FC350)

Some muffler questions that get sent to my email inbox usually look like, “which muffler is best for my bike? Is a full system worth the money or can I just get away with purchasing a slip on”? “Is my stock muffler the best muffler option for me”? Instead of trying to keep answering some…

ByKris KeeferSeptember 28, 20220Comments

Bolt-Ons Exhaust KiT Performance

FMF Fatty/Gnarly Pipe & Powercore 2 Silencer (2022 YZ250)

The 2022 Yamaha YZ250 is a hell of a fun bike to ride. Even though I am not a huge two stroke guy, I had a great time riding it and thought it had a better engine character than the previous model. The new intake design really helps smooth the power down low and makes…

ByKris KeeferOctober 3, 20210Comments

Bike Brands KiT KTM Motocross

2022 KTM 450 SX-F What Would You Do?

People always ask, “what would you do to your own bike”? Most of the time that question gets answered at the track or through email, but I thought I would put it out there for the world to see through my site. The KTM 450 SX-F is one of my favorite bikes to ride and…

ByKris KeeferAugust 16, 20210Comments

Bike Brands Bolt-Ons Exhaust Honda KiT Performance

Slip On Or Full Muffler System (2021 Honda CRF450/250R)

Some muffler questions that get sent to my email inbox usually look like, “which muffler is best for my bike? “Is a full system worth the money or can I just get away with purchasing a slip on”? “Is my stock muffler the best muffler option for me”? Instead of trying to keep answering some…

ByKris KeeferMay 19, 20210Comments

Bike Brands Bolt-Ons Exhaust Honda KiT Performance

FMF 4.1 RCT Muffler System (2020-2021 Honda CRF250R)

The 2020-2021 Honda CRF250R chassis is one of the most fun to ride in the 250 class, with its easy to corner nature as well as a great suspension package. However, Honda focused a lot of their engine R&D on peak horsepower and not torque, which to me the CRF250R lacks the most of. When…

ByKris KeeferFebruary 10, 20210Comments

Bike Brands Bolt-Ons Exhaust KiT Performance Suzuki

2020 FMF Factory RCT 4.1 Stainless Full System (Suzuki RM-Z450)

FMF has helped us on many builds and you may be wondering why do we use them so much? Well… A couple reasons are because FMF is a great American made company, they are easily accessible to us dumb media people and they actually care about the results of their product. If for whatever reason…

ByKris KeeferJune 25, 20200Comments