2025+ Ranger XP 1000 Stage 1 Lock & Load Kit

The Aftermarket Assassins Stage 1 Lock and Load Kit pairs an AA ECU flash with the AA S1 clutch kit for the 2025 and newer Polaris Ranger XP 1000. The key to power on this motor is RPM, so the tune removes high RPM torque limits and the clutching lets the motor rev to 7500 to 7800 RPM where it makes best power.

Why it holds up

• Level 1 91 to 93 octane tune adds 5 RWHP and AA rates it 10 to 11 RWHP over stock with clutching. A Level 1 87 octane tune is also offered
• Recoil magnetic clutch weights with a custom AA profile and nitrocarburized coating for wear resistance
• Smooth engagement that removes the factory jerk off idle, plus cooler belt temps on larger tires
• Speed limiter removed in high gear and raised to 45 MPH in low and 30 MPH in reverse. AA sees 75 to 80 MPH on regular cab and up to 70 MPH on crew models
• Rev limit set at 8800 RPM (stock is 8000) and fan on/off at 188/184°F (stock is 203/193)

Fits

• 2025 and newer Polaris Ranger XP 1000 (82HP base), 2 door and crew models
• 2026 and newer Ranger XP 1000 Cab models

In the box

• AA ECU flash for the 2025 Ranger XP 1000
• AA S1 clutch kit with primary spring and magnetic adjustable weights
• Initial clutch setup guideline

Good to know

• Your ECU must be sent in for programming and unlocking unless you buy a new ECU outright.
• An HP Tuners RTD upgrade lets you flash the ECU from your smartphone at any time after the unlock.
• The magnetic weights adjust for different tires, added weight or riding styles without buying extra parts.
• Seatbelt speed limiter and 2 foot limits disabled, start in any gear, and misfire detection desensitized to prevent false codes.