Akrapovic - Keefer, Inc. Tested

Akrapovic Evolution Slip On System (2022-2023 KTM 450 SX-F)

The Akrapovic Evolution slip on version that comes with the Factory Edition is beautiful work of art. If you’re expecting a ton of added RPM response (excitement) from this slip on system compared to a full muffler system, you will be disappointed. The Akrapovic slip on isn’t an exciting/snappy system that will blow your mind…

ByKris KeeferJune 25, 20230Comments

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

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

Bolt-Ons Exhaust KiT Performance

FMF 4.1 Full System Vs. Akrapovic Evolution Full System Vs. Akrapovic Slip On

We recently received the 2020.5 KTM 450 SX-F Factory Edition and after dissecting it for a few weeks, we thought we would test a couple different muffler systems on it. We wanted to see if we could improve upon the KTM Factory Edition’s delivery. The KTM comes with an Akrapovic slip on we thought since…

ByKris KeeferMarch 16, 20200Comments

Bike Brands Bolt-Ons Exhaust Honda KiT Performance

Akrapovic Evolution Muffler System (2020 Honda CRF450R)

This is embarrassing, but I am going to be completely honest here… I think about the Honda CRF450R a lot. More than other machines. I mean I will literally wake up in the middle of the night and think of things to test in order to try and make the Honda chassis calm down a…

ByKris KeeferNovember 5, 20190Comments

Bike Brands Bolt-Ons Exhaust KiT Performance Yamaha

Akrapovic Evolution Titanium Muffler System (2018 Yamaha YZ450F)

You’ve heard me talk a lot about how stock muffler systems are pretty damn good right? Usually I say something like, “the stock 2018 Yamaha YZ450F muffler system is hard to beat”, but that quote doesn't stop me from trying to see if there is something better out there. I am a fan of MXGP’s and…

ByKris KeeferApril 26, 20180Comments

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