Performance – Keefer, Inc. Tested

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

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 Exhaust Hard Parts Kawasaki Performance

Yoshimura RS-12 Stainless Full System Review

We all know Kawasaki left a lot of room for improvement on the muffler side of things on the 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 the new Yoshimura RS-12 stainless full exhaust…

ByKris KeeferJanuary 10, 20260Comments

Bike Brands Bolt-Ons Hard Parts KTM Performance

Project KTM 350 SX-F: Dual Injector Set Up/Install

ByKris KeeferDecember 1, 20250Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance Suspension

Kawasaki KX450 Mods That You Can Feel

ByKris KeeferNovember 30, 20250Comments

Bike Brands Exhaust Hard Parts Kawasaki Performance

Review: Pro Circuit Ti-6 Pro “BC” (2024-2026 KX450)

It’s not rocket science that the 2024-2026 Kawasaki KX450 mufflers are plugged up! There is a ton of room for improvement with the engine character with just a slip on. “Kris, it’s a 450, how much power do we actually need”? You would be right, but also there is a fine line of too slow…

ByKris KeeferNovember 25, 20250Comments

Bike Brands Performance Yamaha

2026 Yamaha YZ450F Optional Yamaha Power Tuner Map

If you had a 2024-2025 Yamaha YZ450F and then purchased a new 2026 YZ450F you may notice a little more engine braking with the new '26 bLU cRU machine. For me, it made the new Yamaha difficult to roll corners as it upset the chassis at times (once the suspension was broken in). Relaxing the…

ByKris KeeferNovember 20, 20250Comments

Bolt-Ons Exhaust Hard Parts Honda Performance

Tested: Yoshimura RS-12 Full Titanium System

I mean if you have a Honda CRF450R, it’s almost illegal NOT to run a Yoshimura. No, but seriously, Yoshimura does make one of the best looking Honda mufflers in existence. Yoshimura quality is also second to none and when you bolt on a Yoshimura, you know it’s not going to be a nightmare. We…

ByKris KeeferNovember 19, 20250Comments

Bolt-Ons Hard Parts Motocross Performance

Ride Engineering Pulse Replacement Rotor

If you’re looking for a 270mm replacement rotor for your Yamaha or Kawasaki or if you want to go oversize on your Honda, KTM, Triumph, Beta, Gas Gas or Husqvarna, Ride Engineering has an inexpensive option for you. Ride Engineering's Pulse Rotor kits are 10mm larger than stock and made from a special grade stainless/iron…

ByKris KeeferNovember 11, 20250Comments

Bike Brands Bolt-Ons Hard Parts Performance Yamaha

Race Tech Airboot For 2024-2026 YZ250F

ByKris KeeferOctober 22, 20250Comments