🚗 Automotive Jun 12, 2026 · Caleb Jacobs

Ultimate Harbor Freight Go-Kart Engine Cost $8,725 to Build—For Real

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Ultimate Harbor Freight Go-Kart Engine Cost $8,725 to Build—For Real
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Harbor Freight is the default choice for budget DIYers across the United States. That doesn’t mean projects involving Harbor Freight products can’t get pricey, of course. I’m not just talking about bathroom remodels, as this insane Predator 670 build from Red Beard’s Garage proves. He started with a $950 V-twin engine and went on to dump more money into it than some people spend on their LS V8 builds.



To be clear, this is far from run-of-the-mill. It has to be the most

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