S&S Cycle Flywheel Assembly for 124" Big Twin Engines, Part 320-0477

Product type: Bottom End Components

SKU : 0922-0160

Regular price $1,595.95 USD

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Flywheel Assembly - 4-5/8" - 124" Big Twin '84-'99 Upgrade your Harley-Davidson Big Twin with the S&S Cycle Flywheel Assembly designed for...

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Flywheel Assembly - 4-5/8" - 124" Big Twin '84-'99

Upgrade your Harley-Davidson Big Twin with the S&S Cycle Flywheel Assembly designed for 124" engines from 1984 to 1999. This high-performance replacement features a three-piece design with CNC-machined, heat-treated steel forgings that are 114% stronger than stock steel flywheels, providing enhanced durability and reliability under higher RPM conditions. The assembly includes fully assembled, premium-quality S&S heavy-duty 7.667" connecting rods with full-width wrist pin ends, ensuring smooth operation and longevity. Precision trued to less than .0005" runout on pinion and sprocket shaft bearing surfaces, this flywheel assembly maintains excellent balance and rotational stability, ideal for high-performance applications. The left side flywheel is notched to accommodate a crank position sensor, supporting modern engine management systems. Balanced specifically for stock bore and 3-5/8" stroker pistons, this assembly ensures optimal engine performance and smoothness. Whether you're restoring or upgrading your vintage Harley, this flywheel assembly offers the strength, precision, and compatibility needed for a reliable, high-performance engine build.

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