HZ Assembled Cylinder Head Kit for Honda GX630 GX660 GX690 688cc Horizontal and Vertical V-Twin Engine (1# 12110-ZEA-000)

Professional Grade V-Twin Cylinder Block Assembly Restore your engine to its peak performance with our premium cylinder head and block assembly. Specifically engineered for the Honda 688cc V-Twin series, this integrated unit is sourced from the same factory that supplies the engine’s production line, ensuring identical quality and durability to the component your engine was initially built with. Wide Compatibility: Perfectly fits a range of high-performance models: Horizontal Engines: GX630, GX660, GX690 (20.8HP, 21.5HP, 22.1HP) Vertical Engines: GXV630, GXV660, GXV690 Integrated Design for Reliability: Unlike older models, this series features an integrated cylinder and head design (No head gasket required). This advanced construction improves heat dissipation and eliminates the risk of head gasket failure, providing a long-lasting solution for heavy-duty industrial or commercial use. IMPORTANT: Selecting the Correct Side (#1 or #2) These engines use different assemblies for each side. To ensure a 100% correct fit: Check the die-cast marking ("1#" or "2#") on the surface of your current cylinder. Select the corresponding option from the menu above. Option 1# (Right Side): Replaces OEM 12110-Z6L-010, 12110-Z6L-307, 12110-ZEA-000. Option 2# (Left Side): Replaces OEM 12120-Z6L-010, 12120-Z6L-307, 12120-ZEA-000. Complete Installation Kit: Each assembly comes pre-assembled with essential components, including the cylinder block, spark plug, rocker arms, valve springs, and necessary mounting hardware, allowing for a fast and seamless repair.

IMPORTANT NOTE: Please check the die-cast marking "1#" on the surface of your original cylinder head and verify the OEM part number 12110-ZEA-000,12110-Z6L-010 or 12110-Z6L-307. This is the Right Side (#1) assembly. Please ensure both the marking and part number match your old part before purchasing to guarantee a correct fit

This assembled cylinder block kit fits Honda GX630, GX660, and GX690 V-Twin Horizontal Engines (688cc, 20.8HP to 22.1HP). Replaces OEM Part # 12110-ZEA-000, 12110-Z6L-010, 12110-Z6L-307.

Perfectly fits Honda GXV630, GXV660, and GXV690 V-Twin Vertical Engines. Designed for 688cc models across various power ratings (20.8HP, 21.5HP, and 22.1HP).

Sourced from the factory that supplies the engine’s production line. This GX630 GX690 barrel tube head assembly matches the exact specifications and heavy-duty performance of the component your engine was initially built with.

This complete all-in-one kit Includes 1x Pre-assembled Cylinder Head, Spark Plug, Rocker Arms, Valve Springs, Mounting Bolts/Nuts, and Gasket Sets. Ready for immediate installation to save your repair time.