Boyesen Pro Series Reeds KTM 125 SX / 125 EXC / 200 SX Boyesen Pro Series reeds use a carbon fiber top reed coupled with a durable fiberglass/epoxy bottom reed. This unique multi-stage design improves the pistons reaction time throughout the entire powerband and delivers precise throttle response, making it easier to ride smoother and with greater control. Features: Extremely crisp throttle response compared to stock reeds Carbon fiber top reed coupled with a durable fiberglass/epoxy bottom reed Multi-staged reeds distribute the engine's pulse forces over more surface area Delivers peak horsepower from low to high RPM's Durable T2 epoxy construction offers extended lifespan Compatible with stock reed valves only Note: Images are for reference only, actual product will vary based on make and model.