Primary Housing Spacers

3 products

Our range of primary housing spacers for Harley-Davidson covers spacers used when fitting wider tyres or custom belt drives that require the primary case to sit further outboard. Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, stocks primary housing spacers from Belt Drives Ltd. — an American specialist with deep credibility in primary and belt drive componentry for the Harley-Davidson aftermarket. Fitment covers 1970–2006 Big Twin (excluding 2006 6-speed Dyna), suiting late-Shovelhead, Evolution and Twin Cam platforms during wide-tyre conversions or open belt primary installations. Without correct spacing, the primary chain or belt and rear pulley won't track in the same plane, causing premature wear and noisy running. Whether you're building a fat-tyre custom Softail or refreshing an Evo Big Twin with an aftermarket open primary, getting the spacer stack right is key. Browse the full range below.