Product Parameters
| Specification Item | Description |
|---|---|
| Compatible Models | STIHL 024, 024AV, MS240, 024 Super |
| Replaces OEM Part Nos | 1121 030 2005 (Piston Kit) / 1121 020 1200 (Cyl. & Piston Kit) |
| Piston Diameter | 42 mm (1.65 inches) |
| Ring Size | 42 mm x 1.5 mm (often sold in sets of two) |
| Kit Contents (Piston Kit) | Piston, Gudgeon Pin, 2x Rings, 2x Circlips |
| Kit Contents (Cyl. & Piston) | Cylinder, Piston, Rings, Pin, Clips, Base & Muffler Gaskets |
| Cylinder Plating | Nikasil (on cylinder & piston kits) for wear resistance and heat transfer |
Product Description
1. Restores Lost Compression and Power
Replacing the worn piston and rings with this 42mm assembly restores cylinder sealing, which directly improves engine compression, throttle response, and overall cutting power
.
2. Available in Multiple Kit Configurations
The repair can be tailored to your needs: a full cylinder and piston kit (OEM 1121 020 1200) provides a complete top-end rebuild
, while a piston-only kit (OEM 1121 030 2005) is a cost-effective option if the cylinder is still in good condition
.
3. Durable Aftermarket Construction
High-quality aftermarket kits feature a Nikasil-plated cylinder bore, providing excellent wear resistance and heat transfer properties for long-lasting performance. The kits usually include all necessary gaskets and seals for a comprehensive rebuild
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FAQ
Q1: What's the difference between a "piston kit" and a "cylinder and piston kit"?
A: A piston kit (1121 030 2005) only includes the piston, rings, and pin. A cylinder and piston kit (1121 020 1200) includes these items plus a new cylinder and gaskets, which is necessary if the original cylinder is scored or damaged
Q2: Is this aftermarket kit as good as the OEM STIHL part?
A: Quality can vary. While aftermarket kits offer great value, some users report minor issues like increased vibration from a less-balanced piston, or the need to salvage small parts like the wrist pin bearing from the old cylinder. For heavy professional use, OEM parts may be more durable
Q3: Will a cylinder & piston kit include everything I need for the rebuild?
A: Most comprehensive kits include the cylinder, piston, rings, wrist pin, circlips, and essential gaskets (base and muffler). However, you may need to purchase the piston needle bearing (10x13x12.5mm) separately, as it is often not included
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