Stihl model · engine series 1109
Contra GS 134 cc
134 cc, 2:1 reduction gearbox
The production, market and rarity details above are specific to the Contra GS roster record. The displacement below is specific to this roster record. The chain, bar and mount are the published family fitment for engine series 1109; confirm the pitch, gauge and drive-link count stamped on your installed bar before ordering.
Model & family fitment specs
Chains & bars that fit the Contra GS
Pitch & gauge .404″ · .063–.080″ · recommended bar 36–50″ · bar mount Proprietary / nonstandard mount · round file 7/32" (5.5 mm)
Chain & bar by length
| Bar | Drive links | Shop |
|---|---|---|
| 36″ | 108 DL | Chain → |
| 41″ | 123 DL | Chain → |
| 47″ | 138 DL | Chain → |
Drive-link counts come from STIHL's saw-chain catalog. Guide-bar links are withheld for proprietary / nonstandard mount; still confirm the mount stamp, pitch, gauge and drive-link count on your installed bar 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 fitment? See the bar-mount identification guide and chain & cutter guide.
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Related models in series 1109
Data confidence
Chain, bar, mount and displacement confidence comes from the shared Contra G · 090 G (gear drive) family research.
Something wrong or missing for the Contra GS? Report a correction →