{"product_id":"kibblewhite-valve-spring-kit","title":"Kibblewhite Valve Spring Kit","description":"The Kibblewhite Precision Machining 80-80394 is a high-performance spring-only valve spring kit engineered for various Yamaha applications. Designed in-house using proprietary software, these springs are meticulously analyzed for stress, natural frequency, system harmonics, and fatigue life. The Super-Clean Chrome-Silicon wire used is sourced from Japan, known for its quality, and each spring undergoes a controlled heat treatment, stress relief, and shot peening process to ensure durability and optimal performance.\n\nThis kit provides specific lift specifications for both intake and exhaust valves. The intake side offers a valve lift of 0.350\" with an installed height of 1.370\", featuring 30 lbs of seat pressure and opening to 90 lbs at full lift. The exhaust side provides a valve lift of 0.315\" with an installed height of 1.415\", offering 44 lbs of seat pressure and opening to 95 lbs at full lift.\n\nThis high-performance valve spring kit is compatible with several Yamaha models, including the YZF-R1 from 1998-2003, the Apex from 2006-2010, and the RX-1 from 2003-2005. All KPMI valve springs are manufactured by ISO-certified U.S. based partners, ensuring a high standard of quality. Combining advanced design, simulation, and manufacturing protocols, Kibblewhite Precision Machining aims to deliver the best possible valve springs for performance enthusiasts.","brand":"Kibblewhite Precision Machining","offers":[{"title":"Default Title","offer_id":52686439874872,"sku":"80-80394","price":71.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/658279175.jpg?v=1784873863","url":"https:\/\/store.motormia.co\/products\/kibblewhite-valve-spring-kit","provider":"MOTORMIA","version":"1.0","type":"link"}