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FMF 4.1 RCT Full Muffler System (2022.5 KTM 450 SX-F Factory Edition)

So the new 2022.5 KTM 450 SX-F Factory Edition has gained seven pounds from the standard 2022 version. If you want to knock off almost two pounds of that with a muffler system and get some added power in the mid range look no further than the FMF 4.1 RCT Full System. Yes, that’s right…

ByKris KeeferMarch 22, 20220Comments

Bike Brands Exhaust Kawasaki

PRO CIRCUIT T-6 STAINLESS SYSTEM (2022 KAWASAKI KX250)

The muffler on the stock 2022 KX250 sounds a little too blown out for me in stock form (even when new). The tone of the muffler is not pleasant to the ear, so I crossed my fingers, called Pro Circuit and picked up a T-6 (stainless system) Muffler System to see if it enhances the…

ByKris KeeferJanuary 17, 20220Comments

Exhaust Hard Parts Honda Motocross

YOSHIMURA RS-12 FULL STAINLESS SYSTEM (2022 HONDA CRF250R)

The 2022 Honda CRF250R is a hot commodity and an aftermarket muffler is even hotter. With COVID-19 wreaking havoc on supply, new muffler systems have been a little slow to get released to the consumer. The Yoshimura RS-12 for the 22 CRF250R should be in stock by the time you read this so let’s compile…

ByKris KeeferJanuary 9, 20220Comments

Bike Brands Bolt-Ons Exhaust Honda KiT Performance

Akrapovic Evolution Muffler System (2021-2022 Honda CRF450R)

I had the initial impression of the Akrapovic Evolution muffler system as I was doing a MotoConcepts/Bullfrog Spas Honda team test. I noticed that they have been running Akrapovic systems on their bikes, so I asked if I could borrow one to see how it worked. Akrapovic's Evolution line is their full titanium muffler system…

ByKris KeeferOctober 21, 20210Comments

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 Bolt-Ons Exhaust KiT KTM Performance

Akrapovic Evolution System (2021-2022 KTM 250 SX-F)

When you purchase a 2021 KTM 250 SX-F TLD version the bike comes with a slip on Akrapovic Evolution muffler. However, I know that sometimes, certain machines react better to full systems rather than slip ons, we decided to get the full Evolution system to see how it changes the KTM 250 SX-F’s engine character.…

ByKris KeeferAugust 9, 20210Comments

Bike Brands Bolt-Ons Exhaust KiT KTM Performance

FMF 4.1 Muffler System (2021 KTM 250 SX-F)

My son and I have been going back and forth on mufflers for his KTM 250 SX-F and have went though about three until we settled on the FMF 4.1. We have tried the HGS (which was good), a Yoshimura, as well as a Pro Circuit system, but for his riding style and what he…

ByKris KeeferJune 7, 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 KiT Performance Yamaha

Akrapovic Evolution Muffler (2021 Yamaha YZ450F)

The Akrapovic Evolution muffler system is one of the most beautiful looking systems out there in the market today, is well built, and has quality welds all the way around it. Once hot, the titanium color of the headpipe is the most dynamic blue you will ever see from any muffler manufacturer, which just makes…

ByKris KeeferApril 27, 20210Comments

Bike Brands Bolt-Ons Exhaust Kawasaki KiT Performance

Yoshimura RS-12 Stainless Muffler System (2021 Kawasaki KX450)

The stock 2021 Kawasaki KX450 is pretty damn good machine, but that muffler looks atrocious right? We called up on Yoshimura to see if we can get a more attractive aftermarket muffler system that is actually better than the stock system. I will say that the stock KX450 muffler system works pretty damn well, but…

ByKris KeeferMarch 29, 20210Comments

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