Kris Keefer

Dayr az Zawr

President of Keefer Inc. Testing, Racer X test guy and Pulp MX Show co-host. Subscribe to the RMATVMC Keefer Tested podcast on iTunes.

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Articles

FCP Engine Mounts (2025 KX250)

2 days ago | pulpmx.com | Kris Keefer

While I am navigating this amateur motocross thing with my son Aden, I also try give him the best parts I am able to without breaking my bank account. Yes, we do get a lot of stuff for free but I also spend a lot of money. Sure, I don’t spend as much money as the normal weekend warrior but I try and put myself into a “non industry” type rider to see if some of these parts are worth purchasing. This brings me to engine mounts.
Keefer Rides Max Vohland's ClubMX Handbrake Bike

4 days ago | racerxonline.com | Rob Filebark |Kris Keefer

Kris Keefer headed east to ClubMx to ride Max Vohland's Muc-Off/FXR/ClubMx YZ250 with a custom "hand brake" set up from Clake/ASV Inventions. After what most thought to be a career ending injury, Max made it back to racing but due to nerve damage in his right leg/foot he had to make some changes to the bike. 6 Months and 1 podium later, he and the ClubMX team have become innovators in the sport.
Inside Look at Dean Wilson’s Factory Honda HRC Progressive CRF450R Fill-In Bike Breakdown

1 week ago | racerxonline.com | Tom Journet |Kris Keefer

Salt Lake City, UT Salt Lake CityMonster Energy AMA Supercross Championship Christien Ducharme walks Kris Keefer through the ins and outs of Dean Wilson's Honda HRC Progressive CRF450R. Wilson stepped in as a fill-in rider when both Jett and Hunter Lawrence went out with injury mid-way through Monster Energy AMA Supercross. Ducharme is usually Jett Lawrence's mechanic but stepped in for Wilson to finish out the season. He talks through Wilson's setup compared to Jett's normal setup.
Breaking Down Chase Sexton's 2025 KTM 450SX-F Supercross Race Bike

1 week ago | racerxonline.com | Tom Journet |Kris Keefer

Salt Lake City, UT Salt Lake CityMonster Energy AMA Supercross Championship This bike took Chase Sexton to seven wins in 2025 Monster Energy AMA Supercross and within two points of the 450SX Championship. Mechanic Jade Dungey joins Kris Keefer to guide you through the differences between Chase's bike in 2024 and 2025—including big changes to the engine and clutch for starts and more.
AOW Fork Lugs For 23-25 YZ450F

1 week ago | pulpmx.com | Kris Keefer

It’s nice to be able to be back east and be able to test new things to see what it does on different types of dirt. I just so happened to be at Club MX doing some testing/training with my kid and Jonny Oler of Art OF War (AOW) Suspension text me to see if I had time to test something for him. I happily obliged as I am always into testing new things so he came out and brought a set of some re-valved KYB YZ450F suspension to try.
2025 KTM 350 SX-F XPR Garage Build

2 weeks ago | racerxonline.com | Simon Cudby |Kris Keefer

Build: Chad Braun/XPR MotorsportsText: Kris KeeferVideo/Photos: Simon CudbyYes, just like I mentioned in the last issue, the KTM 350 SX-F is probably the most fun motocross bike there is to date. But what about making a 350 with more power? Will it make the bike too hard to ride? Can it compete with a 450? These are all the questions that I get asked all the time when it comes to this uniquely sized machine.
Kris Keefer Breaks Down 2025 450SX Champion Cooper Webb's Yamaha YZ450F

3 weeks ago | racerxonline.com | Tom Journet |Kris Keefer

Salt Lake City, UT Salt Lake CityMonster Energy AMA Supercross Championship Fly Racing presents Bike Breakdowns from the pro pits in Monster Energy AMA Supercross and the Pro Motocross Championship. Kris Keefer gets the details on Cooper Webb's Championship-winning Monster Energy Yamaha Star Racing YZ450F, with mechanic Alex Campbell. From engine and chassis preferences for Cooper, to trick parts that aid reliability, you'll learn the tricks right here.
Ducati Desmo450 MX

3 weeks ago | racerxonline.com | Simon Cudby |Kris Keefer

Kris Keefer goes to Italy and rides the all new 2026 Ducati Desmo450 MX. Learn about the new Italian stallion of the motocross world and how it rides compared to other 450s out on the market. The Ducati Desmo450 MX will be U.S. dealerships in July.
6 or 9 Things About The Ducati Desmo 450 MX

3 weeks ago | pulpmx.com | Kris Keefer

Ducati invited us to come test ride their very first motocross machine, the Desmo 450 MX. I hopped on a plane to Bologna, Italy to take a quick tour of the factory as well as ride the new red machine at 04 Park-Monte Coralli. Unless you’ve been living under a rock, Ducati’s desmodromic valve is a reciprocating engine poppet valve that is positively closed by a cam and leverage system, rather than by a more conventional spring.
2025 KTM 350 SX-F Garage Build

1 month ago | racerxonline.com | Simon Cudby |Kris Keefer

Build: Jamie EllisText: Kris KeeferVideo/Photos: Simon CudbyThis isn’t a shocking news brief. The KTM 350 SX-F is probably the most fun motorcycle you can swing a leg over. What happens when you add horsepower to an already fun machine? You get riders saying the “P” word. What is the “P” word, you ask? Perfect. This word isn’t used in a test rider’s vocabulary at any time. In fact, it’s forbidden to say. How can anything be perfect in the world of motocross?