{"product_id":"namura-040-over-bore-piston-kit-for-honda-xr400r-fits-1996-2004-models-86mm","title":"Namura .040 Over Bore Piston Kit for Honda XR400R fits 1996-2004 Models 86mm","description":"\u003ch2\u003e.040 Over Bore Piston Kit for Honda\u003c\/h2\u003e\u003cp\u003eThis Namura .040 over bore piston kit is built for Honda XR400R models from 1996 to 2004, sized at 86mm. It restores compression and power when reboring the cylinder to the first oversize.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Namura .040 over bore piston kit replaces the stock piston in Honda XR400R engines from 1996 through 2004, using an 86mm bore. It includes the piston, rings, wrist pin, and circlips for a complete top-end rebuild. Designed for trail and competition use, it maintains reliable compression and reduces blow-by.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHigh-silicon aluminum alloy casting for lightweight strength\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves for consistent sealing\u003c\/li\u003e\n\u003cli\u003eMolybdenum-coated wrist pin reduces friction\u003c\/li\u003e\n\u003cli\u003eKit includes all necessary components for installation\u003c\/li\u003e\n\u003cli\u003eOversized to clean up worn cylinder bores\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Honda XR400R (1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004)\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRebuilding a high-mileage XR400R top end\u003c\/li\u003e\n\u003cli\u003eRestoring lost compression in enduro or dual-sport bikes\u003c\/li\u003e\n\u003cli\u003eCompetition use where maximum reliability is required\u003c\/li\u003e\n\u003cli\u003eTrail riding and adventure riding maintenance cycles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e86mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 in (1.016mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNamura\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHonda XR400R 1996-2004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to hone the cylinder before installing this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, always hone the cylinder to the correct crosshatch pattern before installing any new piston to ensure proper ring seating and oil retention.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this piston be used with a stock cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Only if the cylinder has been bored to the corresponding .040 over size; it will not fit a standard 85mm bore without machining.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44890763919446,"sku":"SZ1F13009","price":160.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_814021b1-221c-4a51-a17b-42c79df7267b.jpg?v=1781143517","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-piston-kit-for-honda-xr400r-fits-1996-2004-models-86mm","provider":"Solid Spare","version":"1.0","type":"link"}