The Boyesen RAD Valve Torque Variation is an entirely redesigned, model-specific intake system engineered to optimize low-to-mid range power delivery on the Yamaha YZ250X. Unlike universal reed cages or generic blocks, the Torque Variation features model-specific aero-optimized internal shaping and a tailored dual-carbon reed matrix. This structural blueprint maximizes intake flow velocity at lower RPMs, delivering immediate throttle response, cleaner off-bottom fueling, and punchy torque. It is the ultimate bolt-on advantage for hard enduro, tight woods racing, and technical single-track where crawling speed traction and instant roll-on acceleration are paramount.
Torque-Optimized Internal Aerodynamics: A one-piece cast aluminum housing with precision-contoured internal walls eliminates hard steps and sharp edges, stabilizing low-RPM airflow for explosive fuel delivery.
X-Cross Dual Carbon Weave: Features multi-staged reed stacks woven from premium aerospace-grade carbon fiber. The matrix tension is tuned specifically to match the pressure pulses of the YZ250 engine to prevent low-end bog.
MS Plus Flow Optimization: Patented multi-stage layout uses a lightweight, highly flexible top petal for razor-sharp response at partial throttle, backed by a stiffer, ported bottom petal that takes over at higher revs.
Seamless Bolt-On Installation: A true direct replacement for the stock cage that mates perfectly with the OEM air boot without any trimming, modifications, or compromises to structural sealing.
Reduced Reed Petal Fatigue: Advanced pressure-distribution geometry splits pulse forces across a wider surface area, reducing physical wear and extending the lifespan of the carbon fibers.
If you have any questions or need help finding what you need for your motorcycle or your next adventure please reach out:
EMAIL US AT tmbrmoto@tmbrmoto.com- OR CALL - 208-254-2044
