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Two new silver piston rings 42.5mm x 1.2mm for Stihl chainsaw

LAHDEK

LAHDEK Chainsaw Piston Rings 42.5mm x 1.2mm 2PCS for STIHL 025 MS250 MS 250 Replacement Parts

SKU CH-1D6N-7M047

Two 42.5 mm by 1.2 mm piston rings replace OEM 1123 034 3006 on Stihl 025, MS250 and MS 250 petrol chainsaws

  • Restores compression with 42.5 mm x 1.2 mm precision rings
  • Direct replacement for Stihl OEM 1123 034 3006
  • Two rings included for complete piston service
  • Fits Stihl 025 MS250 MS 250 chainsaws
  • New condition ensures reliable engine performance

LAHDEK Piston Rings 42.5 mm x 1.2 mm

This LAHDEK replacement set includes two piston rings sized at 42.5 mm by 1.2 mm. They are engineered to fit Stihl 025, MS250 and MS 250 petrol chainsaws. The parts replace OEM reference 1123 034 3006. The kit suits owners restoring compression on those specific saw models.

Capacity and headroom

Two rings are supplied, matching the typical twin-ring arrangement for the listed engines. They restore the seal between piston and cylinder bore for the 42.5 mm bore size. The rings do not address wear on the piston, cylinder or bearings. Buyers whose bore measures outside 42.5 mm will need a different size.

Build quality and mounting

The rings are manufactured to the stated 42.5 mm diameter and 1.2 mm thickness for direct installation into the original piston grooves. No additional tools or modifications are required beyond standard piston-ring procedures. The set contains only the two rings; gaskets, clips or piston assemblies are not included.

Highlights

  • Restores compression with 42.5 mm x 1.2 mm precision rings
  • Direct replacement for Stihl OEM 1123 034 3006
  • Two rings included for complete piston service
  • Fits Stihl 025 MS250 MS 250 chainsaws
  • New condition ensures reliable engine performance

Specifications

No published specifications for this item yet.

Questions about this item

Will these 42.5mm piston rings seal correctly in a cylinder that has seen years of use on my STIHL MS 250?

The rings are manufactured to 42.5mm x 1.2mm dimensions matching OEM 1123 034 3006, so they will seat in the original bore provided the cylinder is within factory wear limits.

How can I verify the rings are seated properly after I install them on the 025 MS250 piston?

After installation, check that each ring rotates freely in its groove and the end gaps are staggered; a compression test on the 250 cc engine should then read within the manufacturer’s specified range.

The listing says the package includes 2 piston rings; do I need to buy new circlips or a wrist pin separately?

Only the two 42.5mm rings are supplied; circlips, wrist pin and any gaskets must be sourced separately if they are worn or damaged during the rebuild.

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