2026 250MX Recommended Chassis Lengths

I have been wanting to do this for quite sometime as chassis lengths are important to how your motorcycle reacts on the track. Sometimes we just go about our day, slap a different size sprocket on or cut our new chain a different length. However, when you do that it can/does affect how your bike…

ByKris KeeferJuly 7, 20260Comments

Keefer Tested

RMATVMC Keefer Tested Show #489 – Summer School w/The Keefers (Red Bud Re-Cap)

http://media.blubrry.com/keefer_tested/pulpmx.com/podcasts/260705_keefer.mp3 The Keefers sit down to discuss all that went on behind the scenes at round number 5 of the AMA Pro Motocross series at Red Bud. Learn about bad qualifying etiquette, melt downs, brake checks, a new PNH angle that was unlocked, heart rate data and much more from this Summer School special.

ByKris KeeferJuly 5, 20260Comments

Tech Trackside Training

The Fitness You Lose Isn’t the Fitness You Think

By Seiji Ishii One of the most common conversations I have with riders starts about ten minutes into their first ride back after some time off. "I lost everything." Usually, they haven't. One of the most common mistakes I see is riders confusing a loss of sharpness with a loss of fitness. The two are…

BySeiji IshiiJune 30, 20260Comments

Kawasaki Keefer Tested

RMATVMC Keefer Tested Show #488: Kawasaki KX450X Build & Mammoth MX Talk

http://media.blubrry.com/keefer_tested/pulpmx.com/podcasts/260625_keefer.mp3 Keefer brings in Gary Sutherlin to the show to discuss his Kawasaki KX450X build and why these hybrid Moto/off-road models are great when it comes to a rider that loves both disciplines. We also break down why purchasing a moto model isn't always the best move even when you ride moto more than off-road. Mammoth…

ByKris KeeferJune 29, 20260Comments

Kawasaki

Why Pick The Most Controversial 450 To Race LL’s?

ByKris KeeferJune 28, 20260Comments

Honda

2025 Honda CRF450X Garage Build

ByKris KeeferJune 25, 20260Comments

Honda Kawasaki KTM Suzuki Tech Trackside Triumph Yamaha

2026 450 MX Recommended Chassis Lengths

I have been wanting to do this for quite sometime as chassis lengths are important to how your motorcycle reacts on the track. Sometimes we just go about our day, slap a different size sprocket on or cut our new chain a different length without hesitation. However, when you do that it can/does affect how…

ByKris KeeferJune 23, 20260Comments

Keefer Tested

RMATVMC Keefer Tested Show #487: Parts That We Have Tested Lately

http://media.blubrry.com/keefer_tested/pulpmx.com/podcasts/260619_keefer.mp3 Keefer breaks down several parts that he has tested the past few weeks and will give you all the details behind each part/test. From STM clutches to Ride Engineering brake systems, this episode has a lot to cover.

ByKris KeeferJune 22, 20260Comments

Keefer Tested Podcasts

RMATVMC Summer School (Re-Cap Of High Point)

http://media.blubrry.com/keefer_tested/pulpmx.com/podcasts/260621_keefer.mp3 The Keefer family sit down to discuss the happenings from round 4 of the AMA Pro Motocross Series from High Point. If you guys didn't make it to High Point, listening to this episode will feel like you were there! From more PNH stories, "A" qualifying antics, traveling without dad, things that made us go…

ByKris KeeferJune 21, 20260Comments

Garage Tech

VP Racing Fuels (ProCar Blend vs TT blend)

Written By: Victor Guerrero At Keefer Inc Testing we have talked many years about VP racing fuels, but this one is not something we have ever written about. Some of our testers have alternate hobbies to occupy their time away from work and motocross. That hobby involves radio controlled cars that have 3.5cc engines in…

ByKris KeeferJune 21, 20260Comments