Exhaust – Page 2 – Keefer, Inc. Tested

FMF 4.1 Slip On Muffler (2024 KX450)

We recently took delivery of FMF’s 4.1 slip on muffler design to put on our 2024 Kawasaki KX450. FMF is offering a full and a slip on design but for the time being let’s talk about the slip on version. FMF’s slip on version will shed almost 1.5 pounds off of the rear of the…

ByKris KeeferMarch 4, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Performance Yamaha

Pro Circuit Ti-6 Muffler System (2024 Yamaha YZ450F)

The Pro Circuit Ti-6 Titanium Exhaust System is constructed of titanium throughout the head pipe, mid pipe, and canister while the end-cap is carbon fiber. I wanted the Ti-6 system because I wanted to lose a little weight as the this version of the “6s” allows me to shed almost two pounds off of the…

ByKris KeeferJanuary 5, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance

Pro Circuit Ti-6 Muffler System (2024 KX450)

Aftermarket muffler manufacturers rejoice! The 2024 Kawasaki KX450 has A LOT of room for improvement with its muffler system. The stock muffler is choked up and makes the KX450 feel somewhat lethargic for a 450. Yes, I know what you’re thinking.. “Kris, it’s a 450, how much power do we actually need”? You would be…

ByKris KeeferDecember 17, 20230Comments

Bolt-Ons Exhaust Garage Hard Parts Performance Tech Trackside

Moto Products Showcase (Video)

ByKris KeeferNovember 27, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Husqvarna Performance Suspension

2023 Husqvarna TE300 Garage Build (Video)

ByKris KeeferSeptember 25, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Honda Performance Suspension

2024 Honda CRF450R Baseline Settings/Mods That Work

The 2024 Honda CRF450R is unchanged from 2023 so we have a good idea on what works and what doesn't. Since I am VERY familiar with the brand, (being that I tested their production motorcycles for quite some time) I have an idea on what works and what does NOT. Below are some suggested suspension…

ByKris KeeferSeptember 18, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts KTM Performance Suspension

2024 KTM 450 SX-F Baseline Settings/Mods

The 2024 KTM SX-F lineup is the same as the 2023 version but that didn’t stop us from going through our settings again to see what was good and what could use some improvement. Specifically, the KTM 450 SX-F is still a stiffer nature feel and will take some time to break in. Even when…

ByKris KeeferSeptember 8, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Keefer Tested Performance Podcasts Suspension

Road To Mammoth Video Series Part Two

ByKris KeeferAugust 22, 20230Comments

Bike Brands Bolt-Ons Exhaust Graphics Hard Parts Performance Yamaha

2023 Yamaha YZ450F Garage Build (Video)

ByKris KeeferAugust 18, 20230Comments

Bike Brands Bolt-Ons Exhaust Hard Parts KTM Performance Suspension

Race Test: The Mods That I Have Done To My Personal KTM 350 SX-F Machine

I have loved the 350cc size machine for quite some time but it didn't always make sense to me. From 2012-2016 I thought the 350 was a fad and wasn't going to sell as much as KTM would have hoped for. You had to ride it like a 250, it felt heavier like a 450…

ByKris KeeferAugust 15, 20230Comments