Stock Outboard Racing Commission Passes New Pistons
By: Jeff Brewster | Stock Outboard Chairman | Apr 22, 2020
The SORC has approved the manufacture of a .030 over piston for the Model 102 & 300 series Yamato engines.
The ballot has passed with 13 commissioners voting to approve and 1 against. This will now provide the go ahead to start the production process. The new piston is not approved for use until the beginning of the 2021 season. Hopefully in a few weeks, we will be able to provide ordering information.
Stay safe,
Jeff Brewster
Stock Outboard Chairman
Latest Headlines
- Trackside Registration Directions
- 2026 Stock Outboard National Champions
- Jimmy Shane Takes Home Sixth APBA Gold Cup
- APBA Gold Cup Returns to Madison for Historic 116th Running
- Solar Splash
- United States Awarded 2027 UIM Jet Sprint World Championship
- ROAD TO MONACO: RWO LANDS HISTORIC UIM AGREEMENT
- Springfield, OH Spring Test and Tune
- APBA A GEARCASE
- Implementation Trackside for APBA Event Racer Registration
- West Coast Upcoming Dunk Certifications
- Harbor Freight Tools for Schools Fuels Expansion
- APBA Safety Capsule Training 2026
- APBA Hall of Champions Class of 2025
- Region 9 Oroville, CA
- Gear Up for 2026 APBA Membership Renewals Now Open

