Carburetor Intake Manifold Spacer Insulator for 4 Stroke Scooter Moped ATV Go-Kart 139QMB 139QMA 147QMD GY6-50 GY6-80 Bolt Spacing: 46mm Inner Hole Diameter: 16.7mm Overall Length: 59.7mm Overall Width: 35.1mm Thickness: 5.7mm Application: GY6-50/60-80 /ATVs based on 139QBM 4-stroke engine Features: The GY6-50 Carburetor Intake Manifold Spacer Insulator is designed for 4-stroke mopeds, ATVs, and go-karts powered by the 139QMB, 139QMA, and 147QMD GY6 engines.It fits 49cc, 50cc, and 80cc models, performance and longevity.The 5.7mm thickness provides insulation and heat and vibration, improving engine efficiency and.The insulator is engineered for easy installation with a bolt spacing of 46mm and an inner hole diameter of 16.7mm.Its precise dimensions compatibility with a wide range of GY6-based engines, including the 150cc GY6 engine long case.The design allows for smoother airflow, contributing to better fuel efficiency and increased power output.This component is suitable for enhancing scooter or ATV performance while maintaining.It is a practical choice for 4-stroke engine applications.Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.