{"product_id":"racing-valve-spring-kit-for-harley-davidson-xl-900-1957-1959","title":"Racing Valve Spring Kit For Harley Davidson XL 900 1957-1959","description":"Racing Valve Spring Kit\u003cli\u003eDesigned for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm\u003c\/li\u003e\u003cli\u003eProgressively wound springs using Kobe super-clean, chromium silicon(CrSi) based wire that is heat treated and shot peened\u003c\/li\u003e\u003cli\u003eComplete set for one engine\u003c\/li\u003e\u003cli\u003eMade in the USA\u003c\/li\u003eMay require machining of valve guides for special seals.\nMay require \"R\"-style valves to achieve correct install height.\nKit Includes:\n• 4x CrSi Valve Springs\n• 4x H.T. Steel Retainers\n• 4x H.T. Steel Basewashers\n• 4x H.T Steel Keeper (Pairs)\u003cp\u003eThis item fits to following bikes.\u003c\/p\u003e\u003cli\u003eHarley Davidson FXS 1340 1979-1983\u003c\/li\u003e\u003cli\u003eHarley Davidson FXWG 1340 1980-1983\u003c\/li\u003e\u003cli\u003eHarley Davidson XL 900 1957-1959\u003c\/li\u003e\u003cli\u003eHarley Davidson XLC 900 1958\u003c\/li\u003e\u003cli\u003eHarley Davidson XLCH 1000 1972-1978\u003c\/li\u003e\u003cli\u003eHarley Davidson XLCH 900 1958-1972\u003c\/li\u003e\u003cli\u003eHarley Davidson XLCR 1000 1977-1978\u003c\/li\u003e\u003cli\u003eHarley Davidson XLH 1000 1972-1983\u003c\/li\u003e\u003cli\u003eHarley Davidson XLH 900 1958-1972\u003c\/li\u003e\u003cli\u003eHarley Davidson XLS 1000 1978-1983\u003c\/li\u003e","brand":"Kibblewhite","offers":[{"title":"Default Title","offer_id":55734160589179,"sku":"09260799","price":179.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0648\/6881\/0972\/files\/09260799_01.jpg?v=1757506310","url":"https:\/\/motosuperstore.co.uk\/products\/racing-valve-spring-kit-for-harley-davidson-xl-900-1957-1959","provider":"Moto Superstore","version":"1.0","type":"link"}