78.5MM 329cc Motorcycle Cylinder Piston Pin Kit For TRX350 2000-2006 UTV ATV Engine Parts 12000-HC4-000 12100-HC4-000 Bore size: 78.5mm Package includes: Cylinder Piston Kit *1 Replaces Part Number: 13112-HN5-670, 12100-HN5-670 Fitment: Designed for models with engine type TRX350 2000 - 2006 Compatible with vehicle types commonly known as UTV and ATV Note: Verify engine specifications match the model year and design prior to installation. Compare dimensions and configuration with the existing unit and reference image to confirm compatibility. Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.