{"product_id":"namura-040-over-bore-top-end-repair-kit-for-gas-gas-mc125-2002-2007-55mm","title":"Namura .040 Over Bore Top End Repair Kit for GAS GAS MC125 2002-2007 55mm","description":"\u003ch2\u003eNamura .040 Over Bore Top End Repair Kit for GAS GAS\u003c\/h2\u003e\u003cp\u003eThis Namura top end repair kit with .040 over bore (55mm) rebuilds the cylinder and piston assembly for GAS GAS MC125 motorcycles from 2002 to 2007. It includes piston, rings, pin, and gaskets to restore compression and power.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Namura .040 over bore top end repair kit is engineered for GAS GAS MC125 two-stroke dirt bikes, providing a complete cylinder rebuild solution. The kit includes a cast piston with rings, wrist pin, circlips, and a full gasket set, allowing you to refresh the top end and regain lost performance. Specifically sized at 55mm bore for .040 over, it matches the oversize required for worn cylinders.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eNamura cast piston offers reliable strength and thermal stability\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves ensure proper seal\u003c\/li\u003e\n\u003cli\u003eIncludes .040 over bore specification for worn cylinder restoration\u003c\/li\u003e\n\u003cli\u003eComplete gasket set eliminates separate purchases\u003c\/li\u003e\n\u003cli\u003eLightweight piston design reduces reciprocating mass for quicker throttle response\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor GAS GAS MC125 2002\u003c\/li\u003e\n\u003cli\u003efor GAS GAS MC125 2003\u003c\/li\u003e\n\u003cli\u003efor GAS GAS MC125 2004\u003c\/li\u003e\n\u003cli\u003efor GAS GAS MC125 2005\u003c\/li\u003e\n\u003cli\u003efor GAS GAS MC125 2006\u003c\/li\u003e\n\u003cli\u003efor GAS GAS MC125 2007\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMotocross and off-road racing\u003c\/li\u003e\n\u003cli\u003eTrail riding and enduro events\u003c\/li\u003e\n\u003cli\u003eEngine rebuilds and top-end overhauls\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\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, Rings, Pin, Circlips, Gaskets\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 replate my cylinder when using a .040 over bore kit? \u003cstrong\u003eA:\u003c\/strong\u003e For a .040 over bore, you must have the cylinder bored and honed to the correct size by a qualified machine shop before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should I replace the crank bearings when doing a top end? \u003cstrong\u003eA:\u003c\/strong\u003e While not always required, it is wise to inspect the lower end for play; if the crank has significant hours, replacing the bearings is recommended.\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":44949746122838,"sku":"SZ1F13903","price":186.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_ad219409-84e9-479e-8fa4-7b3c72bc948e.jpg?v=1781397805","url":"https:\/\/www.solidspare.com\/products\/namura-040-over-bore-top-end-repair-kit-for-gas-gas-mc125-2002-2007-55mm","provider":"Solid Spare","version":"1.0","type":"link"}