Yamaha

YZ 250/450F Brembo Brake Mod (Re-Visit)

So are you tired of that spongey feeling stock Yamaha brake? Since I get to ride all the bikes, I would have to say that the Brembo system is one of the best feeling brakes out of all the MX machines. However, a little mix and matching can get you a more linear feel than…

ByKris KeeferNovember 11, 20240Comments

Bike Brands Yamaha

2025 Yamaha YZ250F World Vet Race Test

It has been about a year since I raced motocross when I heard rumblings of Matthes and Keefer racing the Glen Helen Vet Nationals in early November. If you know Kris, it only takes about one phone call that can involve some verbal motivation and next thing I knew I was on the Glen Helen…

ByKris KeeferNovember 10, 20240Comments

Bike Brands Hard Parts Performance Yamaha

Optional 2025 Yamaha YZ250F ECU Map

If you're looking for a little more low end and increased mid range recovery, this "RESPONSE" map will help in those areas.

ByKris KeeferNovember 7, 20240Comments

Bike Brands Yamaha

Inside Phil Nicoletti’s Club MX/FXR Yamaha YZ450F

ByKris KeeferOctober 30, 20240Comments

Hard Parts Suspension Yamaha

2023-2025 Yamaha YZ450F Optimal Swingarm Measurements

I am not going to sit here and tell you that you need to be as meticulous as we are at times here at Keefer Inc. Testing but if you like to tinker and make adjustments here are some key swingarm pivot to center of rear axle lengths. I have tried a lot of different…

ByKris KeeferOctober 29, 20240Comments

Bike Brands Performance Yamaha

2024-2025 Yamaha YZ450F Optional ECU Maps

If you're looking for some optional maps to try for your 2024-2025 here are two recently that I have tried. One map has more torque feel yet has more connectivity because of the TC setting. The second map is more aggressive, has less engine braking but has a good amount of traction out of corners…

ByKris KeeferOctober 27, 20240Comments

Bike Brands Bolt-Ons Gasgas Hard Parts Honda Husqvarna Kawasaki KTM Suzuki Yamaha

2025 MX Gearing Guide

Even though we are not into 2025 quite yet, it is 2025 new bike season and we have been logging the hours on our 2025 motocross machines. I have spent a lot of time testing on the 2025 MX machines you see below. I (as well as a couple other members of our team) have…

ByKris KeeferOctober 16, 20240Comments

Bike Brands Yamaha

2024-2025 Yamaha YZ250F Optional Power Tuner Map

Like we mentioned in show #400 of the RMATVMC Keefer Tested Podcast, this KEEFER TORQUEY FREE FEEL map will help engine de-cel feel (engine braking) as well as increase rear wheel traction out of corners with slightly less quick revving spool up. If you prefer a little more traction out of this map on late…

ByKris KeeferOctober 8, 20240Comments

Bike Brands Keefer Tested Podcasts Yamaha

RMATVMC Keefer Tested Show #400: 2025 Yamaha YZ250F Ride Impression

http://media.blubrry.com/keefer_tested/pulpmx.com/podcasts/241006_keefer.mp3 Yamaha didn't change much for on their YZ250F for 2025 but are those changes worthy of you purchasing a new bLU cRU over a 2024? Keefer walks you through Yamaha's changes, why they were made and how those changes come to fruition during production testing.

ByKris KeeferOctober 7, 20240Comments

Bike Brands Yamaha

2025 Yamaha YZ250F First Ride Impression

ByKris KeeferSeptember 30, 20240Comments

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