420253255 Exhaust Power Valve Cap for Sea-Doo SPX 800 1997-1999

Exhaust Power Valve Cap for Sea-Doo

This exhaust power valve cap replaces OEM part 420253255, sealing the RAVE valve assembly on Sea-Doo 800 engines to keep exhaust timing consistent.

Overview

This exhaust power valve cap is a direct replacement for the RAVE valve on Sea-Doo 800 engines, capping the valve housing to maintain proper exhaust port timing. Built to match OEM 420253255 dimensions, this power valve cap keeps the valve sealed against exhaust pressure and heat. It suits riders maintaining or rebuilding a 1997 through 1999 Sea-Doo SPX 800, plus anyone servicing RAVE valves across the 800 platform.

Built For Performance

• Replaces OEM part 420253255 for a direct fit
• Seals the RAVE exhaust power valve housing against pressure loss
• Withstands the high heat of two-stroke exhaust flow
• Helps maintain correct exhaust port timing as rpm rises
• Compact threaded design installs with basic hand tools

Fits These Machines

• for Sea-Doo SPX 800 1997
• for Sea-Doo SPX 800 1998
• for Sea-Doo SPX 800 1999

On-The-Job Use

• Top-end rebuilds on the 800 Rotax engine
• RAVE valve cleaning and resealing
• Pre-season exhaust system inspection
• Restoring consistent power delivery through the rev range

Specs At A Glance

Good To Know

Q: Does this cap work on both RAVE valve cylinders? A: Yes, it fits the power valve housing used on the 800 twin, so the same cap serves either cylinder. Always compare the old part number 420253255 before installing.

Q: Can I reuse the old gasket or O-ring? A: Fresh sealing hardware is recommended whenever the power valve cap is removed, since used seals may leak under exhaust pressure. Inspect the valve stem and housing threads while the cap is off.

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