LSSMGMD FS450 Piston Kit 42MM for compatible trimmers, blowers and pole saws Restore engine compression and extend equipment life with this complete 42 millimeter piston kit designed for small two stroke engines. The kit contains the essential parts needed for a reliable cylinder rebuild or field . Key benefits Restores compression and reduces smoke and poor running caused by worn piston or rings. Includes all needed components for a straightforward replacement so you can get equipment back in service quickly. Precision fit for 42 millimeter bore engines to minimize installation issues and ensure proper cylinder clearance. What is included 42 millimeter piston Piston rings Circlips Wrist pin assembly Compatibility Compatible with models including FR450, SP450, FS400, FS480, SP400 Intended for use in handheld and polemounted garden equipment such as strimmers, blowers and pole saws Designed as a direct replacement for engines with a 42 millimeter piston bore Key attributes Function: replaces worn piston and ring assembly to restore engine sealing and performance Size: 42 millimeter piston bore Components: piston, rings, clips, and pin assembly supplied for a complete Performance: engineered to fit specified 42 millimeter cylinders for consistent compression and reliable running when installed correctly Practical use scenarios Maintenance : a scored or worn piston and rings during routine engine overhaul to a strimmer to reliable operation. Field : Carry the kit as a spare for quick roadside fixes on a pole saw or blower when a piston failure would otherwise halt work. Rebuild project: Use the kit when rebuilding the cylinder assembly after overheating or prolonged wear to restore compression and extend service life. Installation notes Intended for users familiar with small engine or for professional technicians. Verify 42 millimeter bore and model compatibility before installation. Follow standard engine assembly procedures, torque specifications, and breakin recommendations for results. This piston kit provides the core components needed to or rebuild a 42 millimeter small engine cylinder assembly on compatible garden power equipment.