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Ten silver metal piston rings in a row

LAHDEK

LAHDEK 12mm x 425mm Piston Ring Kit 10PCS for STIHL 025 MS250

SKU CH-AXNW-1J40Y

Ten-piece piston-ring kit fits Stihl 025 and MS250 chainsaws, replacing OEM part 1123 034 3006

  • 10 rings per kit simplify multiple engine rebuilds
  • 12 mm width by 425 mm diameter matches original specs
  • Direct replacement for OEM part 1123 034 3006
  • Designed for Stihl 025 and MS250 petrol chainsaws
  • New condition ensures reliable compression from first start

Compatible Chainsaw Piston Rings

This kit supplies ten piston rings sized 12mm by 425mm for Stihl 025 and MS250 chainsaws. They replace the original equipment part number 1123 034 3006 and are designed for two-stroke petrol engines. The rings are new and ready for installation during engine rebuilds.

Suits Stihl 025 and MS250 Owners

The rings fit the specified Stihl models exactly, so owners of other chainsaw brands or different Stihl displacements should not use them. Mechanics who need a single ring rather than a ten-piece set will find the pack quantity excessive. Buyers requiring a complete piston assembly must source the piston and pin separately.

Sustained Operation Behaviour

Under continuous cutting the rings maintain compression in the two-stroke cylinder, helping the engine deliver steady power without pressure loss. Heat cycles from prolonged use are managed by the ring material and dimensions matched to the 12mm by 425mm specification. Proper lubrication and correct installation gaps remain essential for long-term sealing performance.

How it compares

Measured against everything we stock in Small Engines & Engine Parts, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 55% of the 501 comparable items (median $28.99).

Specifications

No published specifications for this item yet.

Questions about this item

Do I need a Stihl MS250 or 025 chainsaw for this 12 mm x 425 mm piston ring kit to fit?

Yes, the kit is made for Stihl MS250, 025 and MS 250 models and replaces OEM part 1123 034 3006.

Will these rings work if I keep the original 2-stroke petrol cylinder and piston?

They are designed as direct replacements for the OEM rings in those 2-stroke petrol engines.

How can I confirm the 10 rings are seated correctly after installation?

After fitting, the engine should build normal compression and run smoothly on petrol without excessive smoke.

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