Stihl model · engine series 1109
Contra GS
134 cc, 2:1 reduction gearbox
The production, market and rarity details above are specific to the Contra GS roster record. The chain, bar and displacement figures below are the published family fitment for engine series 1109; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Family fitment specs
Chains & bars that fit the Contra GS
Pitch & gauge .404″ · .063–.080″ · recommended bar 36–50″ · round file 7/32" (5.5 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 36″ | 108 DL | Chain → Bar → |
| 41″ | 123 DL | Chain → Bar → |
| 47″ | 138 DL | Chain → Bar → |
Drive-link counts from STIHL's saw-chain catalog. The chain is set by pitch + length (confirm the count stamped on your bar); the guide bar also depends on your saw's mount, so verify fitment before ordering.
Files, oil & sharpening
Suggested match: Oregon 27/59-series. Confirm the drive-link count for your exact bar length before ordering. These are equivalent aftermarket (Oregon) chains, not genuine STIHL chain — STIHL sells its own chain through its dealer network, and we're not affiliated with STIHL. New to pitch & cutter types? See the chain & cutter guide.
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Related models in series 1109
Data confidence
Chain, bar and displacement confidence applies to the shared Contra G · 090 G (gear drive) family data.
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