Center Main Thrust Ring for Kawasaki STX-12F 1200 2003-2007

Center Main Thrust Ring for Kawasaki

This center main thrust ring is a crankshaft thrust component that fits Kawasaki STX-12F 1200 watercraft, controlling end play on the center main journal of the 1200cc marine engine.

Overview

This center main thrust ring for Kawasaki is a crankshaft thrust component that limits axial movement of the crank inside the 1200cc engine case. It holds the center main journal in position so the connecting rods and bearings stay aligned under load. A practical choice for riders and shops servicing a Kawasaki STX-12F 1200 crankshaft assembly.

Built For Performance

• Precision-formed thrust surface for accurate crankshaft end play control
• Built to handle the axial loads seen in a 1200cc marine engine
• Installs at the center main journal position of the crankshaft
• Sold as a single center main thrust ring
• Suited to bottom-end refresh work on STX-12F 1200 watercraft

Fits These Machines

• for Kawasaki STX-12F 1200, 2003-2007

On-The-Job Use

• Crankshaft service on STX-12F 1200 personal watercraft
• End play correction during bottom-end rebuilds
• Shop engine refresh work on 2003-2007 1200cc models
• Restoring thrust clearance after crankshaft inspection

Specs At A Glance

Good To Know

Q: How do I know if this thrust ring needs replacing? A: Check crankshaft end play against the service specification during teardown. Excess play or visible wear on the thrust surface points to replacement.

Q: Does the ring need to be matched to a thrust size class? A: Yes, thrust ring selection depends on the measured end play and journal size. Confirm the size class and serial number details before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.