Hard Parts – Keefer, Inc. Tested

2026 250/450 MX Gearing Guide

I have spent a lot of time testing on the 2026 MX machines you see below. I (as well as a couple other members of our team) have went back and forth on several bikes to see which gearing would be good for the average rider. I did the evaluations on tight clay based tracks…

ByKris KeeferMay 1, 20260Comments

Bolt-Ons Hard Parts Yamaha

Pro Circuit HC Piston Kit (2024-2026 KX450)

Are you looking to get a little more torque out of your KX? The Pro Circuit HC Piston Kit will give you just that. The PC Piston has a 14.2:1 compression ratio and the kit comes with coated wrist pin, rings and clips. This kit requires some sort of race fuel but if you’re reading…

ByKris KeeferMarch 8, 20260Comments

Bike Brands Bolt-Ons Hard Parts Honda

Flo Motorsports 10mm Clutch Master Cylinder: Honda CRF450R

ByKris KeeferFebruary 16, 20260Comments

Bolt-Ons Hard Parts

Race Cups or Triple Clamps?

ByKris KeeferFebruary 13, 20260Comments

Bolt-Ons Hard Parts Kawasaki Performance

Rekluse APEX Clutch System Review: 2024-2026 Kawasaki KX450

We have been going full bore on trying different KX450 clutches and the next in line was Rekluse’s APEX system. This is the first time I have tried the Rekluse APEX system and came away pretty damn impressed! The Rekluse APEX clutch system is a clutch upgrade for the Kawasaki KX450 and after spending time…

ByKris KeeferFebruary 11, 20260Comments

Bike Brands Bolt-Ons Hard Parts Kawasaki

Hinson Racing Small Diameter Clutch For 2024-2026 KX450

If you have a 2024-2026 Kawasaki KX450 you already know the clutch isn’t that great. It fades during minimal abuse and the lever engagement also can change while you’re riding, not to mention that after only several hours, it can start slipping. I have been on the hunt for something with better engagement when riding,…

ByKris KeeferFebruary 3, 20260Comments