{"product_id":"11-2218-80-inch-evolution-flat-piston-kit-010","title":"80 inch Evolution Flat Piston Kit .010","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003eKeith Black flat top piston set is .010 oversize with an 8.6:1 compression ratio for 1984-up Big Twin Evolution models. The Keith Black 390 hypereutectic alloy is cast in a permanent steel mold which makes it possible to build a light weight piston that makes more power and uses less fuel and lasts longer. Pistons are .010 over sized  for a 3.498 inch bore and has a 8.5:1 compression ratio.  The low heat transfer of the alloy keeps the skirts cool so piston expansion is minimal. The combination of a low heat transfer piston alloy and high compression ring placement increases power and economy. The high ring placement alone reduces detonation and increases the top ring temperature.                                                                    **Note:Run engine at moderate speeds for at least 500 miles  avoiding excessive running in lower gears  in order to properly break-in new pistons and rings.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFITMENT\u003c\/b\u003e\u003c\/p\u003e\u003cli\u003e1984 \/ 1994 FXR  \u003c\/li\u003e\u003cli\u003e1991 \/ 1998 FXD  \u003c\/li\u003e\u003cli\u003e1986 \/ 1998 FLST  \u003c\/li\u003e\u003cli\u003e1984 \/ 1998 FLT  \u003c\/li\u003e\u003cli\u003e1984 \/ 1994 FXR  \u003c\/li\u003e\u003cli\u003e1991 \/ 1998 FXD  \u003c\/li\u003e\u003cli\u003e1986 \/ 1998 FLST  \u003c\/li\u003e\u003cli\u003e1984 \/ 1998 FLT  \u003c\/li\u003e\u003cli\u003e1984 \/ 1998 FXST  \u003c\/li\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eACCESSORY ITEMS\u003c\/b\u003e\u003c\/p\u003e\u003cli\u003e16-0622\u003c\/li\u003e\u003cli\u003e60-0167\u003c\/li\u003e\u003cli\u003e16-0075\u003c\/li\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eREPLACEMENT PARTS\u003c\/b\u003e\u003c\/p\u003e\u003cli\u003e11-1364\u003c\/li\u003ehttp:\/\/www.vtwinmfg.com\/Instructions\/MS\/KB Conversion Piston Guide and Fitment.pdf","brand":"V-TWIN MANUFACTURING","offers":[{"title":"Default Title","offer_id":44213419704637,"sku":"11-2218","price":284.23,"currency_code":"USD","in_stock":false}],"url":"https:\/\/www.widowmakersboneyard.com\/products\/11-2218-80-inch-evolution-flat-piston-kit-010","provider":"Widowmaker's Boneyard","version":"1.0","type":"link"}