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SKU:
NLT1Q02459
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.325-7T Spur Sprocket & Clutch Drum Kit for Stihl MS271 MS291 | 1141 640 2001
$22.99
In Stock
$22.99
Sale price
$22.99
Regular price
This aftermarket .325-inch pitch, 7-tooth spur sprocket and clutch drum kit replaces 1141 640 2001 for compatible Stihl MS271 and MS291 chainsaws.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Stihl MS271 chainsaws equipped with a .325-inch 7-tooth spur system
- Stihl MS291 chainsaws equipped with a .325-inch 7-tooth spur system
Product Overview
A hooked, grooved, blue-discolored, or uneven drive sprocket can accelerate chain wear and create rough chain movement even when the bar and chain are serviceable. This kit replaces the drum and spur drive components that transfer clutch rotation to a compatible .325-pitch chain.
Use it only on MS271 or MS291 saws equipped with the matching .325-inch, 7-tooth spur setup. Chain pitch, drum design, bearing dimensions, and retaining hardware must match the removed parts.
Key Features & Performance
- Matched spur sprocket and clutch-drum service components
- Seven-tooth drive profile for compatible .325-inch chain systems
- Restores a worn chain-drive contact surface
- Useful during clutch, drum, bearing, bar, and chain inspection
Replaces Part Numbers
- 1141 640 2001
- 1121 160 2051 reference for compatible kit components
Common Uses
- Replacing a sprocket with deep chain-drive grooves
- Correcting rough or inconsistent chain drive after the clutch is verified
- Servicing heat-discolored or damaged clutch-drum components
- Completing a drivetrain refresh with the correct bar and chain
Technical Specifications
- Product Type: Spur sprocket and clutch drum kit
- Chain Pitch: .325 in
- Tooth Count: 7
- Compatible Models: MS271 and MS291
- Replacement Type: Aftermarket
Installation & Fitment
- Remove the spark plug lead and follow chainsaw clutch-service procedures
- Confirm the saw uses .325 pitch and a 7-tooth spur before disassembly
- Inspect the clutch, needle bearing, oil-pump drive, bar, and chain for related wear
- Verify free drum rotation and proper chain tension before operating the saw
Compatibility Notice
MS271 and MS291 saws can be configured with different drive systems. Match chain pitch, tooth count, drum design, bearing, retaining hardware, and original part number.
Frequently Asked Questions
Q: How do I know the sprocket is worn? A: Deep grooves, hooked drive surfaces, excessive play, heat discoloration, or rough chain movement can indicate wear.
Q: Can I use this with a 3/8-inch chain? A: No. This listing identifies a .325-inch, 7-tooth spur configuration.
Q: Should the chain be inspected too? A: Yes. A worn chain can damage a new sprocket, and a worn sprocket can shorten chain life.
Part Summary
keywords: Stihl MS271 sprocket replacement, Stihl MS291 clutch drum kit, 1141 640 2001 replacement, .325 7 tooth chainsaw sprocket, MS271 chain drive repair, MS291 spur clutch drum, aftermarket Stihl sprocket kit, chainsaw worn drum replacement
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.