STIHL Cylinder with Piston 54mm for 066 and MS660 - Genuine OEM - 1122 020 1211

The STIHL Cylinder with Piston 54mm (part number 1122 020 1211) is a genuine OEM top-end assembly for the STIHL 066, 066 Magnum, MS660 and MS660 Magnum chainsaws, covering machines manufactured from July 2003 onwards. Supplied as a complete kit including a 54mm chrome-lined cylinder, matched piston, two piston rings, gudgeon pin and circlips, it restores compression, power delivery and starting reliability on a worn or damaged top end — returning the engine to its original 91.6cc factory specification. Available from Gustharts, an authorised STIHL dealer with UK stock ready to ship.

⚠ This part fits 066 and MS660 machines manufactured from July 2003 onwards only. Machines produced before July 2003 require part 1122 020 1209. These are two distinct components — not format variants of the same number. Confirm your machine's production date via its serial number before ordering.

Key Features

• Genuine STIHL OEM top-end assembly — manufactured to original specification for correct bore geometry, compression and thermal management
• Part number 1122 020 1211 — also referenced as 1122-020-1211 and 11220201211; fits 066, 066 Magnum, MS660 and MS660 Magnum from July 2003 onwards
• 54mm chrome-plated bore cylinder — original-specification chrome lining for durability, low friction and heat dissipation under sustained heavy cutting loads
• Complete kit — cylinder, piston, two piston rings, gudgeon pin and circlips supplied as a factory-matched assembly
• Covers Magnum variants — correct fitment for the MS660 Magnum and 066 Magnum alongside standard versions from July 2003
• Restores compression and power — addresses worn, scored or seized top ends, returning engine performance to original specification
• Factory-clearanced piston-to-bore fit — prevents premature ring and bore wear during the critical run-in period

Technical Specification

1122 020 1209 vs 1122 020 1211 - Which Do You Need?

Both parts are genuine STIHL OEM cylinder and piston assemblies for the 066 and MS660 platform. The sole distinction is production date.

Confirm your production date from your machine's serial number or data plate before ordering. If you need help identifying the correct part, use the STIHL Parts Finder or contact Gustharts with your serial number.

Also Known As

The STIHL cylinder with piston assembly is also referred to as a top-end rebuild kit, barrel and piston assembly, pot and piston kit, jug and piston set and engine top-end kit. For the MS660 and 066 specifically it is commonly searched as an MS660 cylinder kit, MS660 Magnum cylinder or 066 top-end kit. For ordering, use STIHL part number 1122 020 1211 for July 2003 onwards machines, or 1122 020 1209 for pre-July 2003 machines.

Often Replaced Alongside

A top-end rebuild is the natural point to inspect and renew related components disturbed during cylinder removal:

• Head and cylinder gasket set for MS650/MS660 (1122 007 1053) — always fit new gaskets; never reuse old ones during a top-end rebuild
• Spark plug (NGK BPMR7A) — replace as standard practice at every top-end rebuild
• Air filter for MS660 — inspect and replace if contaminated; a blocked filter accelerates bore wear

Explore More

• STIHL Spare Parts
• STIHL Parts Finder
• STIHL Machinery

FAQs

Which machines does part 1122 020 1211 fit?

Part 1122 020 1211 fits the STIHL 066, 066 Magnum, MS660 and MS660 Magnum manufactured from July 2003 onwards. Machines before July 2003 require part 1122 020 1209.

What is included in the kit?

The kit includes: 54mm chrome-plated cylinder, matched piston, two piston rings, gudgeon pin and circlips — everything required for a complete top-end rebuild.

How do I confirm which cylinder my MS660 needs?

Check the production date encoded in your machine's serial number. Pre-July 2003 machines need part 1122 020 1209; July 2003 onwards need 1122 020 1211. Contact Gustharts with your serial number if you need confirmation.

Does this fit the MS660 Magnum?

Yes. Part 1122 020 1211 covers the MS660, MS660 Magnum, 066 and 066 Magnum from July 2003 onwards. The Magnum variants were not covered by the earlier 1122 020 1209.

Is this a chrome or Nikasil cylinder?

Genuine STIHL OEM — chrome-plated bore, matching the original factory specification. Follow the run-in procedure in the STIHL service manual when commissioning a new cylinder assembly.

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