Unlock the full performance potential of your Polaris RZR 900 with these custom Aftermarket Assassins tunes built specifically for the Dynojet Power Vision 3 and Power Vision 4. Designed for RZR 900 S, Trail, and XC models, these precision-engineered tunes deliver maximum horsepower, torque, and throttle response while maintaining reliability and safety. Whether you ride for recreation or competition, these tunes transform your machine’s performance and driving experience.
From the factory, the RZR 900 engine is heavily restricted, limiting airflow and throttle performance. Aftermarket Assassins eliminates those restrictions with advanced tuning that opens the throttle completely to achieve 100% throttle response, unlocking big horsepower gains. Depending on altitude and temperature, riders can expect up to 95 crank HP with average gains of around 15 HP at midrange conditions. Experience faster throttle response, smoother power delivery, and stronger acceleration across the RPM range.
Each tune adjusts critical parameters such as fuel mapping, ignition timing, torque limiters, fan temperature, and speed governors. The fan activation temperature is lowered to 190/185°F for better cooling, while seatbelt and two-foot limiters are disabled for unrestricted control. The speed limiter is removed in both low and high gears, often resulting in 7–10 MPH higher top speeds. Rev limits remain safe at 8800 RPM, ensuring durability under demanding conditions.
Choose from multiple tuning levels to match your setup. Level 1 is optimized for stock exhaust, Level 2 adds fueling for slip-on or full exhaust systems, and Level 4 is configured for big bore engines. Optional kid-mode and custom race tunes are available upon request, allowing you to tailor performance or restrict power for younger riders.
Aftermarket Assassins tunes outperform standard DynoJet maps by achieving peak timing faster and optimizing fuel delivery for maximum power. Each tune is custom-built for your Power Vision device, with options to modify parameters such as fan temperature or tire size. Tunes are securely delivered via email within 24 hours of order and can be easily installed by following the included instructions. For customers who prefer hands-off setup, Aftermarket Assassins offers a convenient installation service for a small fee.
Take your RZR 900’s performance to the next level with these proven, dyno-tested Power Vision tunes. Pair them with an AA Recoil clutch kit for the ultimate power transfer and enjoy the most responsive, high-performance ride your machine has ever delivered.