How can I determine whether my cylinder is reusable so as to replace just the piston?

The most common problem of a cylinder that needs replacement is in case there are scratches into the surface of the tube where the piston runs.

What other parts I may need to replace on my machine when replacing the piston?

To replace the piston you need to disassemble the engine, so you also need to replace the cylinder gasket, at least. Also, it is recommended to check the piston bearing.

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Piston Kit for STIHL BR 380, BR 400, BR 420, BR 420 C (46mm)

$40.58

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Piston Kit fit STIHL BR 380, BR 400, BR 420, BR 420 C (46mm) and related spare parts.

Details

This listing is about a brand new after-market Piston KitHow to find the size of a piston ring in its original package for the following STIHLSpare parts for STIHL machines models, type B, 46mm in diameter:

BR 380

BR 400

BR 420
BR 420 C

Our Piston Kits are branded and come directly from the top-quality Manufacturers METEOR and EPISAN.
We mention our Suppliers in all our listings, because weﾒre proud of them. No parts in white boxes - No fictitious brands!
Protect your valuable STIHL machine. Use only Branded & High-Quality Parts. Better Safe than Sorry!