Stihl 3/8" Picco 7 Tooth Spur Sprocket Kit - MS201, MS201T

Restore ultimate linear chain velocity and professional-grade oiler synchronization to your production climbing saw with the genuine OEM STIHL 3/8" Picco 7-Tooth Spur Sprocket & Worm Gear Kit. Precision-bundled as a single factory service solution under part number 1145 640 2050, this complete kit is tailored explicitly for the demanding, high-RPM dynamics of the elite MS 201, MS 201 T, MS 201 C, and MS 201 TC arborist saws. Replacing your cutting system with this matched factory configuration remedies high-speed chain slip, fixes erratic lubrication, and ensures sharp power delivery.

This premium original equipment manufacturer kit centers around a case-hardened 7-tooth spur gear fused directly to a reinforced steel clutch drum shell. Upgrading or renewing with a 7-tooth profile maximizes your linear chain speed across the guide bar, allowing tree care crews to sever large limbs and drop canopies with maximum efficiency at wide-open throttle. Additionally, because the kit includes the precisely pitched oil pump worm drive gear, it eliminates the dangerous slip and mismatched wear patterns that happen when mixing new sprockets with aged internal nylon oiler drives.

True OEM Engineering vs. Soft Aftermarket Failures: High-production commercial arborist operations run at extreme structural RPMs that will rapidly destroy cheap un-hardened aftermarket drive drums. Imprecise non-OEM machining results in loose tolerances on the crankshaft, creating harmonic vibrations that destroy the needle bearing, chew up the oil pump gear, and fatigue internal clutch springs. This genuine STIHL kit features identical factory tolerances and includes an OEM piston stop tool to keep your service track safe, quick, and precise.

Configuration & Application Profile: Designed exclusively for STIHL 1145-series professional chainsaws running a 3/8" Low Profile (Picco) pitch chain loop (.043" or .050" gauge). This component will not accept standard 1/4" or full-profile .375" professional chain lines. Complete factory kit contains: (1) 7-Tooth Spur Sprocket/Clutch Drum, (1) Matched Oil Pump Worm Gear, and (1) Factory Piston Stop Installation tool.

Key Features & Benefits

• Complete Factory Service Solution: Bundles the 7-tooth spur drum, matched nylon oiler worm gear, and installation hardware to overhaul the entire drive tract.
• High-Velocity 7-Tooth Profile: Maximizes linear cutting velocity across the bar rail, streamlining high-production tree care and overhead rigging work.
• 100% Genuine OEM STIHL Manufacture: Built to precise original factory blueprints using high-carbon steel alloys for maximum wear resistance.
• Perfect Oiler Drive Integration: Included worm gear ensures immediate oil pump timing, preventing dry bar rails and premature chain stretch under heavy load.
• Concentric Single-Piece Machining: Heavy-duty structural drum balances centrifugal clutch weight perfectly to reduce high-RPM engine vibration.
• Commercial Arborist Security: Eliminates unexpected field failure and costly crew downtime on high-stakes utility or bucket projects.

Technical Specifications & System Components