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

The most common problem of a piston that needs replacement is in case there are scratches on its body.

What other parts I may need to replace when replacing the piston rings?

To replace the piston rings you need to disassemble the engine, so you also need to replace the cylinder gasket.

$5.90

In stock

Piston Ring for ROBIN EC02, FL231, NB26, NB231C, HT231 [#5102501000] and related spare parts.

This listing is about a brand new after-market Piston RingTips for safely installing piston rings for the following ROBIN models, which replaces OEM Part #510-25010-00:

Specifications
Country of Origin	Italy
Product Code	1031228
Compatible Brand	ROBIN / WISCONSIN
Compatible Models	SUBARU-ROBIN / WISCONSIN HT231, NB231C, NB26, FL231, EC02
OEM Part #	5102501000