659M07400 Wiseco Piston Kit .040 for Kawasaki JT900 900STX 1997-2006 74.00 mm

Piston Kit for Kawasaki JT900 900STX

This Wiseco .040 piston kit for Kawasaki JT900 900STX watercraft is an overbore top-end rebuild component that restores compression and cylinder sealing, referencing 659M07400 at 74.00 mm.

Overview

This piston kit is built for the Kawasaki JT900 900STX personal watercraft powered by the 900 STX engine. It supplies a .040 overbore piston sized at 74.00 mm to refresh a worn or scored top end. This piston kit suits riders and shops rebuilding a high-hours 900STX engine.

Built For Performance

• .040 overbore sizing at 74.00 mm for worn or refinished cylinders
• Wiseco forged piston construction for strength under sustained load
• Kit format supplying piston, rings, wrist pin, and clips
• Reference number 659M07400 stamped for this application
• Designed to restore compression in a rebuilt top end

Fits These Machines

• for Kawasaki JT900 900STX, 1997 to 2006

On-The-Job Use

• Top-end rebuilds on high-hours 900STX engines
• Cylinder reboring projects requiring an oversize piston
• Recreational PWC maintenance and repair
• Rebuild work performed by shops and home mechanics

Specs At A Glance

Good To Know

Q: Does this kit include rings and a wrist pin? A: Yes, a Wiseco piston kit of this type normally supplies the piston, rings, wrist pin, and clips. Q: Can I install this without reboring the cylinder? A: No, a .040 oversize piston requires the cylinder to be bored and honed to match 74.00 mm before assembly.

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