Bolt-Ons

REP Linkage (2023-2025 Yamaha YZ450F)

Yamaha changed the linkage ratio for 2025 on the YZ450F. Yamaha was looking to keep the rear up so basically the whole curve of the 2025 linkage ratio is stiffer and that is why Yamaha went down on their spring to a 5.6 N/m from a 5.8N/m spring on the 23/24 models. When Mark Johnson…

ByKris KeeferJanuary 13, 20250Comments

Bolt-Ons Hard Parts Kawasaki

Moto Hose Works Y Silicone Radiator Hose Kit

Written/Tested By: Eddie Laret In 2024 Kawasaki released their new model KX450 with an all-new frame design. This meant the engine had a few different parts to them as the radiator hose kit was a major change for the 2024/2025 models. They relocated the water temperature sensor and jacket in the middle of the upper radiator…

ByKris KeeferJanuary 7, 20250Comments

Bike Brands Bolt-Ons Hard Parts Yamaha

Yamaha YZ450F Flywheel Weight

If you’re a Yamaha YZ450F owner you know that your bike can be a handful at times. If it’s not a handful then you can disregard this test altogether. For me the YZ450F is one of the best bikes in the 450 class for 2025 but it still needs some work to be an easy…

ByKris KeeferJanuary 4, 20250Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki

Pro Circuit Ti-6 Muffler System (2025 KX250)

Kawasaki has an all new KX250 and Pro Circuit just recently came out with their latest Ti-6 version for the new green machine. With airbox changes to the 2025 version as well as a different cylinder head, this forced Pro Circuit to come up with a new headpipe and muffler. We have put time on…

ByKris KeeferDecember 16, 20240Comments

Bolt-Ons Hard Parts 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 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

Bolt-Ons Hard Parts

MAKO 360 Handlebar Mount

Tested/Written By: Victor Guerrero and Kris Keefer INSTALL: We followed the written directions that were provided by XC Gear and for the most part the directions were pretty straight forward. The aluminum cone inserts share the same flat side as the OEM rubber cones for proper orientation inside the stock triple clamp. We did use a small…

ByKris KeeferSeptember 2, 20240Comments

Bolt-Ons Exhaust Hard Parts Kawasaki

Yoshimura RS-12 Stainless System (2024 KX450)

Written By: Eddie Laret/Kris Keefer We all know Kawasaki left a lot of room for improvement on the muffler side of things on the 2024 Kawasaki KX450. We have tried a number of mufflers to help increase the low end torque and have been happy with a couple. The latest muffler we tested was…

ByKris KeeferAugust 6, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance

Pro Circuit Vs. Akrapovic Muffler Shootout (2024 KX450)

ByKris KeeferJuly 5, 20240Comments

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