Motorcycle pit bike shift drum gear shift forks designed for 110cc and 140cc horizontal engines.Compatible with Yx engine models.Components include shift drum and shift forks for transmission.Constructed to match specifications for proper fit and function.Suitable for use in dirt bikes and small displacement motorcycles with similar engine configurations. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.