Kawasaki complete cylinder head kit — Cylinder #1 for FR/FS/FX 726cc, factory-assembled with gaskets & hardware

Genuine Kawasaki complete cylinder head kit #1 (part 99999-0627) — a factory-assembled replacement head for the cylinder nearest the flywheel on Kawasaki 726cc V-twin engines.

This genuine Kawasaki assembly arrives with valves, guides, springs, seals and fasteners preinstalled so you can replace Cylinder #1 quickly and confidently. It’s engineered and packaged by Kawasaki to match OEM tolerances and comes with gaskets and hardware needed for a correct install on FR, FS and FX 651V–730V models. The kit is intended as a direct-fit service part for the cylinder located closest to the flywheel on the fuel-pump side of the engine.

Which Kawasaki models use this cylinder head kit?

This part fits a family of Kawasaki 726cc V-twin engines used in FR, FS and FX series. Verify your engine model and cylinder orientation before ordering to ensure compatibility.

• Compatible with FR651V, FR691V, FR730V engine models
• Works for FS651V, FS691V, FS730V models
• Fits FX651V, FX691V, FX730V 726cc engines
• Specific to cylinder #1 — closest to flywheel on the fuel-pump side

What components are included and why they matter?

The kit is supplied as a full cylinder head assembly and contains all the sealing and valve components you’ll need for a complete head replacement, reducing parts sourcing and alignment issues.

• Cylinder head with valves and valve guides preinstalled for proper valve geometry
• Head gasket and valve cover gasket to restore sealing surfaces
• Valve springs, retainers, collets and oil seals assembled to factory settings
• Manifold gaskets, exhaust gaskets, O-rings, studs and mounting bolts included

How does this kit simplify repair and service time?

Because Kawasaki supplies the head already assembled, you save time on precision assembly steps and reduce the chances of installation errors. The included hardware and gaskets mean fewer trips to the parts counter.

• Factory-assembled valves and seals eliminate complex bench assembly
• Complete gasket and fastener set avoids missing parts during installation
• Direct-fit design reduces machining or modification needs
• Works with standard service procedures for V-twin head replacement

Are there notes or checks to perform before you install this head?

Confirm cylinder numbering and orientation to avoid installing the wrong side. Inspect mating surfaces and follow torque specifications from Kawasaki for head bolts and manifold fittings.

• Verify your engine model (FR/FS/FX 651V–730V) and cylinder #1 location
• Clean and inspect block mating surface for flatness and debris
• Use manufacturer torque sequence and specified values when tightening
• Replace any damaged studs, lines or adjoining components during service

Who is this for: This Kawasaki 99999-0627 cylinder head kit is aimed at professional technicians, small-engine repair shops and knowledgeable DIYers maintaining Kawasaki FR, FS or FX 726cc V-twin engines. It’s ideal when you need an OEM-quality, ready-to-install replacement for the cylinder closest to the flywheel on the fuel-pump side, and when minimizing downtime and installation complexity matters.