Ski-Doo 19T Top Chaincase Gear (13-Wide / 15-Spline) // SKU: TP-351519-002

SKU: TP-351519-002
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$65.95 USD
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SKU: TP-351519-002

Manufacturer: TEAM Industries / Venom Products

Specifications: 19 Tooth (19T) Outer Sprocket | 13-Wide (13W) Chain Pitch | 15-Tooth Internal Spline

Primary Application: Ski-Doo REV Gen4 & Gen5 850 E-TEC mountain snowmobiles (Summit and Freeride models).

Sharpen throttle response and eliminate parasitic clutch drag in thin mountain air with the Ski-Doo 19T Top Chaincase Gear. By dropping one tooth down from factory OEM mountain gearing, this precision upper drive sprocket changes your mechanical advantage right at the chaincase, significantly taking load off the drivetrain and drive belt under heavy deep-snow resistance.

At elevations above 6,000 feet, atmospheric horsepower loss combined with deep-lug mountain tracks puts massive strain on the clutches, causing excess belt heat and sluggish off-idle response. Dropping one tooth on the top sprocket acts as an instant torque multiplier. It relieves strain on your drive sheaves, drops belt operating temperatures, and delivers lightning-fast, crisp throttle snap the instant you squeeze the throttle in steep technical chutes.

Key Features

  • 1-Tooth Down Ratio Drop: Sits one tooth smaller than stock factory gearing to reduce drivetrain load and multiply track-shaft torque.
  • Crisp Mountain Throttle Response: Relieves resistance on the primary and secondary clutches, delivering instant track spin and snappier throttle pickup at high elevations.
  • Drastic Belt Heat Reduction: Taking load off the clutches prevents belt slippage, heat-soak, and premature belt failure on sustained powder pulls.
  • Precision Case-Hardened Steel: CNC-machined by TEAM Industries from high-tensile alloy steel to withstand aggressive torque spikes and severe shock-loading.
  • Exact 15-Spline Drop-In Fit: Slides directly onto OEM Ski-Doo jackshafts with zero modifications and meshes perfectly with standard 13-wide silent drive chains.
  • Essential Kit Component: This is the exact 19T gear included in our Ski-Doo 850 E-TEC Long Track High Elevation Clutch Kit.

Fitment & Installation Notes

  • Compatible Models: Fits Ski-Doo REV Gen4 and Gen5 850 E-TEC / 850 Turbo mountain models (Summit, Freeride) equipped with 13-wide chains and 15-spline jackshafts.
  • Chain Tensioner Verification: In almost all factory 850 mountain applications, the stock chain length accommodates this 1-tooth drop using the OEM chaincase mechanical tensioner. Always verify chain tension and inspect guide alignment prior to sealing the case.
  • Maintenance Tip: Replace chaincase seals if worn and refill with fresh full-synthetic chaincase fluid upon installation.