Chapter 12

Owen pointed his flashlight at the cam sprocket: two teeth off. The chain had slipped forward by exactly two positions. Subtle. Almost invisible. On a modern engine, a sensor would catch it; but on a 1972 Shovelhead with mechanical points, there was no sensor, no warning light, no error code—just an engine that refused to fire because the valves were opening and closing milliseconds off, enough to kill compression entirely."Timing chain slipped two teeth," Owen said. Not to Garrett, not to the crowd: to himself, the way his father used to talk through a diagnosis out loud.He loosened the cam sprocket bolt. Rotated the sprocket backward by hand: two clicks. Felt the chain seat into position. Tightened the bolt. Checked the tension with his thumb: pressed the chain midway between sprockets, measured the deflection by feel. Twelve seconds. The whole repair took twelve seconds.Dale Prescott stood at the edge of the crowd. His face went white: thirty minutes with a $4,000 scanner, missed completely. Because scanners don't read mechanical timing on points-ignition engines; they search for electronic signals that don't exist on a '72 Shovelhead. Owen found it with his ear and confirmed it with a two-dollar flashlight."That's one," Owen said.Garrett glanced at Vince, then back at Owen. "Lucky guess. Even a blind squirrel finds a nut.""Hey, rat!" Garrett barked louder, making sure every phone in the lot picked it up. "One lucky poke doesn't make you a mechanic! My dead grandmother could have knocked that chain back if she tripped over it! You want a cookie? You want me to clap for you?" He slow-clapped: loud, mocking. The crowd joined in: sixty pairs of hands beating a rhythm designed to humiliate. "Clap louder, boys! The car wash kid fixed one thing! Somebody call the news! Alert the president!"Vince grabbed Owen's shoulder and spun him around. "You got lucky once, roach. Touch that engine again and I'll snap that wrench in half and feed it to you."Owen turned back to the bike without a word. He pulled the carburetor bowl off with four quick turns of a Phillips head. Inside, the float—a small brass pontoon controlling fuel level—was supposed to ride freely, opening and closing a needle valve to regulate gasoline entering the carburetor throat. This float was stuck: jammed fully open by a microscopic piece of debris, a flake of old gasket material wedged between the float arm and the bowl wall.With the needle valve permanently open, fuel poured in nonstop. The cylinders flooded; raw gasoline pooled on top of the pistons. A flooded cylinder can't compress; it hydraulic-locks. Even if the timing had been perfect, the engine would never have fired. This was Nolan Briggs's mistake: he'd pulled the carb apart, cleaned every jet, checked every gasket, but he never tested the float under load. On a Keihin butterfly carb from 1972, the float doesn't look stuck unless you press exactly the right spot, exactly the right way.

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