Unleash Your Ride's Potential

Welcome to 603mods Rochester, NH

Family-owned with over 20 years of experience in motocross, restoration, race prep, and performance tuning.

Our Legacy in Motocross Excellence

Welcome to 603mods, a small, family-run shop based in Rochester, New Hampshire. With years of experience riding, racing, and building bikes, we’re proud to offer advanced restoration and performance services to riders across the Seacoast, Lakes Region, and Southern Maine.

Whether you’re reviving a vintage two-stroke, dialing in your race setup, or protecting parts with cutting-edge coatings, 603mods has you covered. We bring together hands-on expertise, precision craftsmanship, and rider-focused care to make every build race-ready.

Our Specialized Services

Vapor Honing & Wet Blasting

Cerakote Finishes

Two-Stroke Motor Building

Motocross Race Prep

Wheel Building

Carburetor Rebuilds & Restoration

Our Work in Action

Explore Our Image Gallery

Upcoming Events

Winchester Supercross Race 1

Join us for an exhilarating night race at Winchester, NH. Witness top-tier motocross action under the lights!

April 12, 2025

FREE Admission

TMA Supercross Rd #2 Spring

Experience the thrill of daytime racing at Winchester, NH. Perfect for fans of high-speed motocross!

May 3, 2025

FREE Admission

Maine Motocross Series

Catch the action at MX207, ME, as riders compete in this exciting motocross event!

May 3, 2025

FREE Admission

Maine Motocross Series

Don’t miss the adrenaline-pumping races at Hemond’s MX Park, ME. A must-see for motocross fans!

June 7, 2025

FREE Admission

Ready to Transform Your Ride?

Discover the unparalleled craftsmanship of @603mods. Whether you’re looking to enhance performance or restore your bike to its former glory, our expert team is here to assist. Dive into our gallery to see our work in action or reach out to start your project today!