{"product_id":"124-chain-drive-power-pack","title":"124\" Chain Drive Power Pack","description":"The S\u0026amp;S Cycle 310-1054 124″ Chain Drive Power Pack is a comprehensive big bore kit engineered to upgrade 107″ Water-Cooled M8 Harley-Davidson engines to 124 cubic inches while maintaining the stock stroke flywheel.\n\nThis kit boasts a wrinkle black finish with highlighted fins, a 4.250″ bore, forged pistons, and an 11:1 compression ratio. The included oil pump and cam plate are precision-machined from billet aluminum with a blue anodized finish, featuring removable passage plugs, independent scavenge sections, debris screens, a magnet in the cam chest, and an adjustable pressure relief valve. The chain drive system utilizes an S\u0026amp;S High Performance cam chain tensioner.\n\nThe package includes a 550 cam specifically designed for big bore applications and high-performance conical single wire valve springs rated for up to .605 lift. This kit is made in the USA.\n\nInstallation of this power pack requires experienced mechanic knowledge, access to a factory service manual, and all necessary tools. Proper measurement of flywheel pinion shaft runout and end play is crucial, as excessive amounts will lead to damage, failure, and void the manufacturer's warranty. An aftermarket tuner, such as the ThunderMax Autotune System, is highly recommended for optimal performance. It is important to note that this kit is not recommended for Tri-Glide or other three-wheel models due to the lugging nature of these bikes.","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":52689682202936,"sku":"310-1054","price":2939.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687136544.webp?v=1784909126","url":"https:\/\/store.motormia.co\/products\/124-chain-drive-power-pack","provider":"MOTORMIA","version":"1.0","type":"link"}