At Six4 Motorsports, we specialize in ATV and Dirt Bike engine rebuilding, performance upgrades, and race-focused engine preparation.
Whether you need a reliable stock-style rebuild or a performance engine built for competition, each engine is inspected, measured, and assembled with attention to detail.
Services May Include
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Complete engine rebuilds
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Top-end rebuilds
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Bottom-end rebuilds
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Blueprinting and precision assembly
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Performance engine builds
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Race engine preparation
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Clutch inspection and service
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Valve train inspection and setup
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Cylinder, piston, crankshaft, and bearing inspection
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Vapor blasting and cosmetic finishing options
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Cerakote options on select engine components
Engines We Work With
We primarily work with ATV, dirt bike, and powersports engines, including popular Honda, Yamaha, KTM, Suzuki, Kawasaki, and other performance platforms.
Not sure if we work on your engine? Contact us before shipping and we’ll confirm.
Ship Your Engine to Six4 Motorsports
Customers do not need to be local. Complete engines can be shipped directly to Six4 Motorsports for inspection, rebuilding, and performance work.
Before shipping your engine, please visit our Ship Your Engine page for instructions.
Get a Build Quote
Every engine is different. Pricing depends on engine condition, parts required, machine work, and the level of performance requested.
Contact Six4 Motorsports with your year, make, model, engine type, and what you want done, and we’ll help determine the best direction for your build.