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Description
1141 640 2003 – STIHL Chain Sprocket (Genuine STIHL OEM Drive Sprocket)
The STIHL 1141 640 2003 Chain Sprocket is a genuine OEM replacement drive sprocket designed to deliver smooth, efficient power transfer from the clutch drum to the saw chain on compatible STIHL chainsaws. Manufactured to STIHL's exact engineering standards, this precision-machined sprocket ensures proper chain engagement, minimizes drivetrain wear, and helps maintain maximum cutting performance.
Constructed from hardened, heat-treated steel, the 1141 640 2003 Chain Sprocket is built to withstand high chain speeds, continuous cutting loads, and demanding forestry and landscaping applications. Replacing a worn sprocket with a genuine STIHL OEM part helps extend the life of the guide bar and chain while restoring smooth, reliable cutting operation.
Product Details
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Part Number: 1141 640 2003
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Brand: STIHL
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Part Type: Chain Sprocket
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Function: Transfers engine power from the clutch assembly to the saw chain
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Material: Heat-Treated Hardened Steel
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Construction: Precision-Machined Steel
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Installation: Direct OEM Replacement
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OEM Status: Genuine STIHL OEM Part
Key Features
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Genuine STIHL OEM chain sprocket
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Precision-machined for accurate chain engagement
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Hardened steel construction for superior durability
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Ensures smooth and efficient power transfer
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Helps reduce chain and guide bar wear
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Designed for demanding professional applications
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Factory-correct fit
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Direct replacement with no modifications required
Function
The 1141 640 2003 Chain Sprocket transfers rotational power from the clutch drum to the saw chain, allowing smooth chain movement around the guide bar. Proper sprocket performance improves cutting efficiency, reduces vibration, and helps maximize the service life of the chain drive system.
Compatible STIHL Models
The STIHL 1141 640 2003 Chain Sprocket fits selected STIHL chainsaws, including:
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STIHL MS 261
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STIHL MS 261 C
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STIHL MS 271
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STIHL MS 291
It may also fit additional STIHL chainsaw models utilizing OEM part number 1141 640 2003.
Always verify your chainsaw model, serial number, clutch configuration, chain pitch, and original OEM part number before ordering to ensure proper compatibility.
Who Is This For?
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Professional arborists
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Tree service contractors
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Forestry professionals
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Firewood processors
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Chainsaw repair technicians
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STIHL chainsaw owners
Recommended Applications
Ideal for:
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Chain drive maintenance
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Clutch drum service
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Chainsaw rebuilds
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Guide bar and chain replacement
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Preventive maintenance
Pros
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Genuine STIHL OEM quality
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Precision-machined hardened steel
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Smooth chain engagement
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Helps extend chain and guide bar life
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Reduces drivetrain wear
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Factory-correct fit
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Long service life
Cons
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Compatible only with specified STIHL chainsaw models
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Chain and clutch drum should be inspected during sprocket replacement
Comparison – STIHL 1141 640 2003 OEM Chain Sprocket vs Aftermarket Sprockets
STIHL 1141 640 2003 Genuine OEM Chain Sprocket
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Exact OEM dimensions and tooth profile
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Premium heat-treated steel construction
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Superior durability and wear resistance
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Smooth, efficient power transfer
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Designed specifically for STIHL chainsaws
Aftermarket Chain Sprockets
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May vary in machining precision and material quality
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Potential fitment inconsistencies
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Increased wear on chain and guide bar
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Shorter service life under heavy-duty use
Why Buy from Barry's Power Equipment?
Barry's Power Equipment is an authorized STIHL dealer supplying genuine OEM replacement parts trusted by professional arborists, landscapers, and outdoor power equipment technicians.
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Genuine OEM STIHL replacement parts
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Fast nationwide shipping
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Competitive pricing
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Expert technical support
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Extensive inventory for STIHL, SCAG, Toro, Exmark, Wright, Ariens, Gravely, Kawasaki, Kohler, Honda, Briggs & Stratton, Ferris, Hustler, Cub Cadet, John Deere, and many other leading outdoor power equipment brands.

