76mm STD Motorcycle Piston And Piston Ring Kit for Scooter XMAX CZD300 18-23 EVOLIS300 TRICITY300 20-23 B74-E1631-01-00 Piston and piston ring kit designed for specific scooter models.Compatible with XMAX CZD300 from 2018 to 2023, EVOLIS300, and TRICITY300 from 2020 to 2023.Features a standard 76mm diameter piston.Includes piston rings and necessary components for replacement.Intended for use in engine rebuilds or performance maintenance.proper compression and engine efficiency when installed correctly. This is not an OEM product.Brand/model references are included solely to assist with compatibility identification.