Stage 1 Performance Kit for Polaris Patriot 850 (Long Track / Mountain Sleds) // SKU: 13-310-1-M

SKU: 13-310-1-M

Primary Application: Polaris RMK, PRO-RMK, Khaos, SKS, and Switchback Assault models equipped with 2.0" or deeper lug tracks riding at High Elevation (6,000+ ft).

Unleash a massive 16+ horsepower gain over stock, relentless steep-incline track speed, and instantaneous throttle response on your long-track Polaris Patriot 850 with the Stage 1 Performance Kit. Built for mountain riders who demand maximum bolt-on horsepower at high altitude, this complete package combines our dyno-proven ECU digital tuning, high-flowing Fat Azz Single Pipe with included High-Altitude Stinger, Ceramic Y-Pipe, heat-slashing Billet Cyclone Primary Clutch Cover, and Stage 2 SNYPR Mountain Clutching system into one fully calibrated package.

Factory exhaust chambers and stock clutching calibrations shift out prematurely and suffer from power-robbing heat soak in deep powder. The Stage 1 Performance Kit completely overhauls exhaust scavenging, ECU fuel/timing mapping, and drive clutch cooling—keeping your Patriot 850 pinned directly in its peak horsepower powerband while dropping clutch operating temperatures by up to 50°F.

1. Choose Your Digital Tuning Platform

Select your preferred tuning delivery method from the dropdown options on this page to load Bikeman's custom Patriot 850 performance calibration:

• Torque Link Pro (Mobile Smartphone Tuning): The ultimate next-generation mobile tuning platform. Flash your Patriot 850 directly from your Apple or Android smartphone via Bluetooth/Wi-Fi with zero computer required. Grants full access to tune libraries, real-time diagnostic engine logging, and fault code clearing trailside.
  *REQUIRED POLARIS HARDWARE NOTE:* Flashing Polaris snowmobile ECUs via Torque Link requires both the Torque Link Data Cable AND the Polaris ECU Power Cable for proper communication and voltage supply during the flash process.
• ECU Hard Flash (Send-In Bench Service): The seamless "set-it-and-forget-it" setup. Simply remove your ECU and mail it directly to our facility. Bikeman calibration specialists will flash our custom tune file directly to your module, clone your vehicle data, and ship it right back ready to plug in and ride.

2. Performance Bolt-On Hard Parts Included

• Fat Azz Single Expansion Pipe (SKU: 01-328): High-volume expansion chamber finished in 1,300°F polished ceramic coating to maximize exhaust scavenging, build internal pipe heat rapidly, and unleash broad power gains.
• Fast Reaction High-Altitude Internal Pipe Stinger (Part #: 01-328-H): Comes automatically included with the Fat Azz pipe package. Regulates expansion chamber backpressure to ensure razor-sharp off-idle throttle response and consistent peak RPM in thin mountain air (6,000+ ft).
• Ceramic Performance Exhaust Manifold / Y-Pipe (SKU: 03-302-C): High-flow manifold that eliminates internal exhaust turbulence, reduces cylinder heat retention, and carries peak RPM further into over-rev.
• Billet Cyclone Primary Clutch Cover (SKU: 05-CYCLONE-1): USA-made 6061 billet cover with integrated fan blades that actively draw cooling air across drive sheaves to drop clutch temps by 30°F to 50°F.
• Complete Stage 2 SNYPR Mountain Clutch Kit (SKU: 06-37-302):
  • SNYPR Adjustable Primary Clutch Weight Set (SKU: 05-HAW-5889) (Includes tuning magnets, set screws & tungsten slugs)
  • Primary Drive Clutch Spring 140-330 (SKU: 05-140-330)
  • Secondary Driven Clutch Spring 160-260 (SKU: 05-TP160-260)
  • Custom Cut Mountain Helix (SKU: 05-TSS-1)
  • Small Secondary Clutch Rollers for TSS / Polaris (SKU: TP-460079K)
  • Secondary Anti-Binding Selection (Select Above):
    • Smooth Shift Secondary Teflon Washers (SKU: 05-TW-301-2)
    • Polaris TSS-04 Secondary Roller Bearing (SKU: 05-RB-301)
  • Comprehensive Clutch Setup Guide

Key Performance Features

• 16+ HP Combined Power Gain: Dyno-proven horsepower and torque increases across the mid-range and top-end when pairing our full-pipe exhaust system with custom digital tuning.
• Active Clutch Cooling Technology: Billet Cyclone cover forces continuous cool airflow over primary sheaves to eliminate belt heat-soak and ensure stable shift RPM.
• Holds Peak Mountain RPM: Eliminates powerband sag and engine bog under extreme snow drag and steep incline resistance.
• Lightning-Quick Powder Backshift: Instantly downshifts when cycling the throttle in technical terrain, putting track horsepower right back on tap without trenching.
• Thermal Barrier Ceramic Finish: Premium high-temp ceramic coating on pipe and manifold retains internal heat to maximize gas velocity while keeping under-hood temps cool.

Critical Fitment & Roller Compatibility Note

Vehicle Fitment & Lug Depth Rules

• SKU: 13-310-1-M
• Compatible Sled Models: Fits all Polaris RMK, PRO-RMK, Khaos, SKS 146 / 155, and Switchback Assault models equipped with 2.0" or deeper lug tracks across all chassis platforms (AXYS & Matryx, 2019+).
• TRACK LUG CUTOFF RULE: ANY Polaris Patriot 850 running a 2.0" or deeper lug track MUST use this mountain kit configuration.
• CRITICAL ELEVATION EXCLUSION: CALIBRATED STRICTLY FOR HIGH ELEVATION (6,000+ FT). Due to expansion chamber volume, this full-pipe kit is not recommended for low-elevation riding (0–6,000 ft). Low-elevation riders seeking bolt-on power should opt for our Budget Kit (SKU: 13-310-BUDGET-M).
• CRITICAL CHASSIS EXCLUSION: Does NOT fit Hill Climb Racer (RMSHA / HCR) competition chassis models due to modified shock tower and bulkhead clearances.
• Tuning Note: Included setup sheets provide baseline weighting guidelines. Minor set-screw or magnet adjustments may be required depending on rider weight, altitude, and specific engine modifications.