{"product_id":"qrs-xp2-secondary-clutch-helix-ski-doo-850-e-tec-mountain-low-elevation-05-xp2","title":"QRS XP2 Progressive Secondary Clutch Helix for Ski-Doo 850 E-TEC (Long Track \/ Mountain - Low Elevation) \/\/ SKU: 05-XP2","description":"\u003cdiv class=\"bmp-product-description\"\u003e\n  \u003cdiv style=\"background-color: #f8f9fa; border-left: 4px solid #0056b3; padding: 12px 15px; margin-bottom: 20px; color: #212529; border-radius: 4px;\"\u003e\n    \u003cp style=\"margin: 0; font-size: 14px; line-height: 1.4;\"\u003e\n      \u003cstrong\u003e⚙️ ELEVATION CALIBRATION:\u003c\/strong\u003e SKU \u003cstrong\u003e05-XP2\u003c\/strong\u003e features our proprietary progressive multi-angle ramp profile, calibrated specifically for \u003cstrong\u003eSki-Doo 850 E-TEC mountain sleds operating at 0–6,000 ft elevations\u003c\/strong\u003e. For high-elevation (6,000+ ft) deep-powder applications, see our XP4 helix profile (SKU: 05-XP4).\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cp\u003e\u003cb\u003eSKU:\u003c\/b\u003e 05-XP2\u003c\/p\u003e\n  \u003cp\u003e\u003cb\u003eClutch Compatibility:\u003c\/b\u003e Ski-Doo OEM QRS Secondary \/ Driven Clutches\u003c\/p\u003e\n  \u003cp\u003e\u003cb\u003eElevation Range:\u003c\/b\u003e 0 to 6,000 Feet (Sea Level to Mid-Elevation)\u003c\/p\u003e\n  \u003cp\u003e\u003cb\u003ePrimary Application:\u003c\/b\u003e Ski-Doo REV Gen4 \u0026amp; Gen5 850 E-TEC mountain sleds (Summit \u0026amp; Freeride) riding at 0–6,000 ft.\u003c\/p\u003e\n\n  \u003cp\u003eHarness the full sea-level horsepower and torque of the 850 E-TEC engine with the Bikeman Performance \u003cb\u003eQRS XP2 Progressive Secondary Clutch Helix\u003c\/b\u003e. Between 0 and 6,000 feet, the naturally aspirated 850 twin produces maximum cylinder pressure and broad torque. Without a secondary helix ramp contoured to manage that low-altitude power against tall, deep-lug mountain tracks, stock sheaves allow the belt to slip under aggressive acceleration, causing premature upshift hesitation, sluggish corner-to-corner recovery, and severe belt-glazing heat.\u003c\/p\u003e\n\n  \u003cp\u003eThe \u003cb\u003eXP2 progressive angle profile\u003c\/b\u003e is engineered to load the 850 engine harder across low-altitude backcountry conditions. It initiates shift-out with an aggressive launch ramp that drives the belt deep into the clutches for violent holeshot acceleration, then transitions progressively to a shallower clamp angle that locks the drive belt tight between the sheaves under full power. This balanced progression delivers crisp, instantaneous backshifting the second you chop the throttle to navigate tight technical tree lines or sidehill lines.\u003c\/p\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eKey Performance Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Elevation Mountain Profile:\u003c\/b\u003e Specifically profiled to convert full sea-level 850 E-TEC torque into explosive track speed on 2.0\"+ lug mountain sleds without blowing past the peak powerband.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eProgressive Dual-Angle Design:\u003c\/b\u003e Launches hard off the bottom and smoothly transitions into a high-pressure clamp angle to prevent belt slippage during wide-open-throttle climbing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eInstantaneous Backshifting:\u003c\/b\u003e Squeezes back down on the belt instantly when you dump and re-engage the throttle, keeping the 850 E-TEC pinned in its 7,900–8,000 RPM sweet spot without bogging.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eSubstantial Belt Heat Reduction:\u003c\/b\u003e Eliminating secondary slip slashes sheave and belt surface temperatures, dramatically extending drive belt lifespan under heavy snow drag.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace-Grade Billet Aluminum:\u003c\/b\u003e Precision CNC-machined from high-tensile billet aluminum to hold micro-tolerances, resist ramp deflection, and prevent roller grooving.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eEssential Kit Component:\u003c\/b\u003e This is the exact secondary helix included in our \u003cb\u003eSki-Doo 850 E-TEC Long Track Low Elevation Stage 2 Clutch Kit\u003c\/b\u003e.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr\u003e\n\n  \u003ch3\u003eFitment \u0026amp; Installation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eVehicle Compatibility:\u003c\/b\u003e Fits all 2017+ Ski-Doo REV Gen4 and Gen5 850 E-TEC mountain models (Summit, Summit Expert, Freeride) equipped with factory QRS driven clutches.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eRecommended Maintenance Upgrade:\u003c\/b\u003e We strongly advise inspecting your secondary clutch rollers during helix installation. Upgrading to our \u003cb\u003eHeavy-Duty BRP QRS Secondary Clutch Rollers\u003c\/b\u003e prevents premature flat-spotting and roller failure common to the OEM composite rollers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eClutch Tooling:\u003c\/b\u003e Requires a standard Ski-Doo QRS secondary clutch compression tool for safe disassembly and reassembly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Bikeman Performance","offers":[{"title":"Default Title","offer_id":54458042482981,"sku":"05-XP2","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6436\/9701\/files\/05-XP2_1.webp?v=1794420487","url":"https:\/\/www.bikemanperformance.com\/products\/qrs-xp2-secondary-clutch-helix-ski-doo-850-e-tec-mountain-low-elevation-05-xp2","provider":"Bikeman Performance","version":"1.0","type":"link"}