Guides
Step-by-step guides to improve your KLX250/300 performance.
Start Here
Engine Guide
New to KLX performance? Understand what restricts your bike and which mods to prioritize.
Engine
Exhaust Guide
KLX250/300 exhaust options compared with dyno data. Stock vs aftermarket vs KTM OEM muffler, weight savings, and sound considerations.
Intake Modifications
Improve airflow to your KLX engine with subthrottle removal, KDX snorkel, and airbox mods. Dyno-tested gains included.
Engine Performance Guide
How to get more power from your KLX250/300. Understanding restrictions and modification options for 30+ horsepower.
ECU Limitations
Understanding how the KLX250/300 ECU restricts power through subthrottle and soft rev limiter. Dyno charts included.
Camshafts
OEM and aftermarket camshaft options for KLX250/300. Specs, part numbers, and performance potential.
Big Bore Kit
Convert your KLX250 to KLX300 displacement with an AHL big bore kit. Cost-effective cylinder and piston upgrade.
ECU Tuning
Learn how to tune your KLX250/300 ECU for maximum power. Covers injector upgrades, JDM ECU, and reflash options.
Suspension
Suspension Guide
Set up your KLX250/300 suspension for your weight and riding style. Spring rates, sag adjustment, and upgrade options.
Shock Upgrades
Upgrade KLX250/300 shock spring for your weight. Finding the right rate and budget-friendly options.
Fork Upgrades
Upgrade KLX250/300 fork springs and valving for your weight. Budget-friendly OEM spring options included.
Suspension Setup
Basic suspension setup and adjustment guide for KLX250/300 dual sport motorcycles.