Namura .020 Over Bore Piston Kit for Sea-Doo 900 ACE 4-Strokes 2014-2024 74.5mm

0.020 Over Bore Piston Kit for Sea-Doo

This overbore piston kit is designed for the Sea-Doo 900 ACE 4-Stroke engines from 2014 to 2024, featuring a 74.5mm bore diameter and 0.020 oversize machining for reliable engine rebuilding.

Overview

The Namura 0.020 over bore piston kit is a direct-fit replacement for Sea-Doo 900 ACE 4-Stroke engines covering model years 2014 to 2024. It restores lost compression and power using a 74.5mm bore and 0.020 oversize, making it a trusted choice for personal watercraft engine overhauls. This piston kit is built for marine engine durability.

Built For Performance

• High-strength aluminum alloy construction for long service life
• Precision-machined 74.5mm bore with 0.020 overbore specification
• Includes piston rings and wrist pin for complete installation
• Engineered to match OEM dimensions for Sea-Doo 900 ACE engines
• Low-friction skirt coating reduces wear in marine environments

Fits These Machines

• for Sea-Doo 900 ACE 4-Stroke (2014-2024)

On-The-Job Use

• Used in personal watercraft performance rebuilds
• Ideal for restoring power in Sea-Doo 900 ACE engines after wear
• Supports high-RPM operation in jet ski applications
• Works with cylinder boring to 74.5mm for 0.020 oversize

Specs At A Glance

Good To Know

Q: Will this piston kit fit Sea-Doo 900 ACE engines with a turbocharger? A: This kit is intended for naturally aspirated 900 ACE models; turbocharged variants use different piston designs and compression ratios.

Q: Do I need to replace the cylinder when using this overbore kit? A: No, you can bore the existing cylinder to 74.5mm, but ensure it is within service limits and professionally machined.

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