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A Winning Career

A leader in motorcycle engine mods, John "Bundy" Mitchell has decades of experience making the fastest motors on the track. Bundy has been on the ground floor of engine advancement. Winning an AMA Supercross Championship with Nathan Ramsey, working at the powerhouse Pro Circuit Kawasaki team, helping develop the modern-day Honda CRF250R and CRF450R - all lifelong dreams for any engine tuner. Bundy has managed to do all that, and he's just getting started.

Engine Modifications

We know that motorcycle technology can be overwhelming. Our team of trained technicians can get the most out of your engine. Bundy Built Motorsports has the experience and expertise needed to get you where you belong -- on the top step of the podium.

Our Services

We offer a wide variety of services, and are not limited to engine upgrades. Bundy Build Motorsports carries a host of motocross and Outlaw kart parts; fully built race engines; and hard to find items not available anywhere else. Please call for details.

Top-End Rebuild

Without proper maintenance, your engine is a ticking time bomb. Let us take the guesswork out of the equation by installing a fresh top-end in your bike.

Port & Polished Cylinder Head

Not all cylinder heads are created equally. Our port and polish service is a guaranteed power booster. We even offer putty modifications for serious racers.

Crankshaft Build & Balance

Getting your crank balanced decreases engine vibration and improves performance. This is a hidden art–one that Bundy Built Motorsports has mastered.

Valve Adjustment

Four-stroke maintenance is a daunting task. Bundy Built Motorsports will make sure your valves are in optimal condition, and that valve timing is to spec.

Complete Bottom-End Rebuild

We’re not afraid to split the cases and go deep into the inner sanctum of your engine. Our complete bottom end rebuild will get you back on the track in no time.

Full Machining Services

Your dreams are our reality. Our machining services know no limits. Cut cylinder heads, welding kart exhausts and more, we can do it all. Call for pricing.