{"product_id":"kb-m8-114-117-to-124-big-bore-conv-piston-kit-005","title":"Kb, M8 114\"\/117\" To 128\" Big Bore Conv. Piston Kit. +.005\"","description":"\u003cp\u003eForged Super Duty series for the Milwaukee Eight 114\" and 117\" engine for a 128\" big bore conversion. Designed to work with both oil\/water cooled engines and up to 3mm larger valves. With hard anodized crown and top ring groove to reflect heat and prevent ring to groove ''micro-welding''. The Line2Line abradable self-lubricating powder coating technique allows zero tolerance installation; final tolerance will be 0.003\". The piston creates its own perfect tolerance during run-in; the coating automatically gives the tightest possible \u0026amp; perfect piston to cylinder fit for no piston rock and best possible ring seal. Note: Fits 114\/117\" M8 engines with stock 4.5\" stroke. Aftermarket 4.25\" bore cylinders are required. For up to 3mm larger valves. - Compression ratio: 11.7:1 - Engine displacement: 128\" - Bore: 4.25\" - Stroke: 4.5\" - Ring Pack: 1.5mm; 1.5mm; 3.0mm - Top land: 0.23 - Pin Number: .927x2.250x.180c-SCR415H - Pin type: Floating - Pin Diameter: 0.927\" - Lock: BR8894-1 - Compression height: 1.083\" - Crown type: Dome - Crown (cc): -2.5 - Alloy: Forged 4032 alloy\u003c\/p\u003e","brand":"Kb Performance Piston","offers":[{"title":"Default Title","offer_id":50010192478536,"sku":"993663","price":536.9,"currency_code":"EUR","in_stock":true}],"url":"https:\/\/holydeath.com\/products\/kb-m8-114-117-to-124-big-bore-conv-piston-kit-005","provider":"Holy Death Motorcycle Co.","version":"1.0","type":"link"}