The Riva Valve Retainer Upgrade Kit increases the reliability of your engine by reducing the possibility of valve float at high rpm. Includes 12 lightweight, precision-machined titanium valve retainers and 6 OE rocker arm shaft bolts that must be replaced during installation. A must for IJSBA & APBA Stock Class race craft.
Applications: All Sea-Doo 1630 & 1503 4-TEC Engines (300, 260, 255, 230, 215, 185, 170 & 130). Not compatible with 900 engines. NOTE: For modified engines (Stage 3 & above) we recommend the complete RIVA Valve Train Upgrade Kit (part # RS19050-VTU).
