Hard Parts

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 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

Hard Parts Tires

Dunlop Factory Spec Tire Review

ByKris KeeferNovember 6, 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 Exhaust Hard Parts KTM Performance

Why A KTM 250 SX-F FMF Megabomb Headpipe Is Better On A KTM 350 SX-F

I originally posted a photo of a KTM 250 SX-F FMF Megabomb headpipe mated to a KTM 350 SX-F 4.1 FMF muffler and my DM’s flooded with questions. Why does it do? Why stick the 250 headpipe on the 350? Normally when you purchase an aftermarket muffler system you usually get a smoother roll…

ByKris KeeferOctober 20, 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 Hard Parts Kawasaki Performance

2025 Kawasaki KX450 Optional ECU Map

Looking for a little more pulling power out of your 2025 KX450? Try this map below and see what you think. This should help pick up (recovery) out of corners as well as give you a little more torque feeling in 2nd and 3rd gears. This map will only work for the 2025 KX450 because…

ByKris KeeferOctober 11, 20240Comments

Hard Parts Tires

The Dunlop MX14 Scoop And Why It’s Misunderstood

We Are In The Scoop Era

ByKris KeeferSeptember 9, 20240Comments

Bike Brands Performance Suspension Yamaha

2025 Yamaha YZ450F Baseline Suspension Settings/Tips/Maps

The 2025 Yamaha doesn’t have a ton of changes on paper but the changes that it does have seem significant enough to feel on the track. I have been messing with clickers as well as Yamaha Power Tuner maps and we’ve decided on the best ones right here. We also wanted to give you brief…

ByKris KeeferSeptember 3, 20240Comments

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