Stihl engine series 1122 · XL
064/066 · MS 660 · MS 650/640
Displacement84.9–91.6 cc
Guide bar20–36″
Chain3/8″ · .063″ · .404″ on long bars
Production1986–2014
Chains & bars that fit the 064/066 · MS 660 · MS 650/640
Pitch & gauge 3/8″ · .063″ · .404″ on long bars · recommended bar 20–36″ · round file 7/32" (5.5 mm)
Files, oil & sharpening
Suggested match: Oregon 72/73/75 EXL. Confirm the drive-link count for your exact bar length before ordering. Genuine STIHL chain isn't sold online — these are equivalent aftermarket (Oregon) specs.
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Models in this family (5)
| Model | Years | Market | Rarity | Notes |
|---|---|---|---|---|
| 064 AV | 1986–97 | Global | Collectable | 84.9 cc big-bore |
| 066 | 1988–03 | Global | Very Common / iconic | 91.6 cc; era benchmark |
| MS 660 | 2004–14 | Global | Very Common | MS-era 066 |
| MS 650 | 2005–12 | EU/AU | Uncommon (US) | Slightly smaller; not US-sold |
| MS 640 | 2003–10 | EU/AU | Uncommon | EU large pro below 660 |
Data confidence
Provenance for this family's figures — verify anything tagged estimated, approx, or stale-risk against STIHL spec sheets.