53112-ZVD-000 Handlebar Collar - Overview. The 53112-ZVD-000 Handlebar Collar is an essential component in Honda marine engine systems. This part acts as a collar or mount for the handlebar assembly, ensuring a secure and proper connection integral to the reliable operation of the throttle and steering controls. Designed to exact factory specifications, the handlebar collar guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specifi