55CI Side Valve Twin

Our Harley-Davidson 55CI Side Valve Twin Parts & Accessories range covers the 883cc side-valve (flathead) twin engine that powered K-model and early Sportster-era motorcycles. As an Iron City authorised Harley-Davidson dealer in Leeds, we stock genuine and aftermarket parts for the 55-cubic-inch flathead platform. You will find pistons, cylinders, valve components, gasket sets, clutch parts, primary drive hardware and restoration-grade engine components for these vintage flathead twins. Whether you are undertaking a complete engine rebuild or sourcing a single hard-to-find part, our team can help you find the right components for your year and configuration. Browse the full range below.