Yamaha WR 426 F Intake Camshaft - Hot Cams - Stage 1 - '01-'02 is a bolt-in intake camshaft engineered to improve throttle response and low-end power for 2001–2002 WR426F models. It’s intended for riders who want measurable, rideable gains without major engine modification.

This Stage 1 camshaft is designed and dyno-proven in the USA using modern valvetrain software to refine lobe profiles for improved midrange and low-end torque. The Hot Cams Stage 1 offers an economical performance upgrade that typically yields a 5–10% power increase when matched with a properly tuned system. CNC-machined from 8620 billet, case-hardened steel, the cam provides accurate lobe geometry and a consistent fit. Installation is straightforward and requires no core exchange, making it a practical choice for enthusiasts who want a reliable, documented improvement to their WR426F.

Features

• Dyno-proven design developed in the USA
• Engineered with advanced valvetrain software for optimized lobe profiles
• CNC-machined from 8620 billet, case-hardened steel for durability and precision
• Stage 1 tuning focused on improved low-end and midrange response
• No core exchange required; straightforward installation
• Estimated 5–10% power gain when installed and tuned correctly

If you have questions or want help confirming fitment for your build, call us directly—our tech staff can advise on installation and tuning. We offer installation and customization services at both our Austin, Texas and Los Angeles, California area locations. Call 512-982-9393 (TX) or 562-981-6800 (CA) to speak with a specialist or schedule service. If you’re considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov