{"product_id":"1989-1990-1991-yamaha-moto-4-250-moto4-yfm250-piston-cylinder-top-end-rebuild-kit-atv-quad-1","title":"1989 1990 1991 YAMAHA MOTO-4 250 MOTO4 YFM250 PISTON CYLINDER TOP END REBUILD KIT ATV QUAD","description":"\u003ch2 style=\"text-align: center;\"\u003e\u003cimg height=\"111\" width=\"329\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0770\/0741\/files\/zoom_zoom_logo_pic_trans_BB_2_68b31b3d-c7f7-45ca-ac37-b3386ebe5b22.jpg?v=1773948542\"\u003e\u003c\/h2\u003e\n\u003ch2 style=\"text-align: center;\"\u003eNEW STOCK BORE CYLINDER KIT\u003c\/h2\u003e\n\u003ch3 style=\"text-align: center;\"\u003eREBUILD YOUR MACHINE WITH OUR NEW HIGH QUALITY OEM REPLACMENT CYLINDER KIT AND GET YOUR MACHINE UP AND RUNNING AGAIN!\u003c\/h3\u003e\n\u003ch3 data-path-to-node=\"0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"0\"\u003eMaximize Power, Minimize Cost: The Ultimate Top-End Rebuild Solution\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"1\"\u003eAre you staring down a top-end rebuild and dreading the dealership price tag for a brand-new factory cylinder? You don't have to drain your wallet to get your machine running like new again.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eBy upgrading to a \u003cb data-index-in-node=\"18\" data-path-to-node=\"2\"\u003emachined steel sleeve cylinder block\u003c\/b\u003e paired with a \u003cb data-index-in-node=\"79\" data-path-to-node=\"2\"\u003epremium name-brand piston\u003c\/b\u003e, you can completely restore your engine's power and reliability for a fraction of the OEM cost \u0026amp; saving yourself time.\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003eHere is why engine builders and weekend warriors alike are making the switch:\u003c\/p\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,0,0\"\u003eUncompromised OEM Performance:\u003c\/b\u003e You don't have to sacrifice speed or torque to save money. High-quality steel sleeves are machined to exact factory specifications, ensuring perfect piston-to-cylinder clearance, optimal compression, and the crisp throttle response you expect.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,1,0\"\u003eMassive Cost Savings:\u003c\/b\u003e Factory-plated cylinders come with premium markups. Choosing a sleeved cylinder keeps hundreds of dollars in your pocket—giving you extra budget for upgrades, gear, or your next racing fee.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,2,0\"\u003eFuture-Proof Durability:\u003c\/b\u003e Unlike standard OEM Nikasil-plated cylinders that must be completely stripped and replated if damaged, a steel sleeve can simply be bored and honed to the next oversize. This makes future rebuilds significantly cheaper and faster.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,3,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,3,0\"\u003eRace-Proven Reliability:\u003c\/b\u003e We pair our steel sleeves with trusted, name-brand aftermarket pistons (like Wiseco, ProX, or Vertex). These pistons are engineered from high-strength aerospace alloys, offering durability that often \u003ci data-index-in-node=\"225\" data-path-to-node=\"4,3,0\"\u003eexceeds\u003c\/i\u003e stock components under extreme riding conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"5\"\u003eDon't pay more for the same ride.\u003c\/b\u003e Get the perfect balance of elite performance, rugged longevity, and unbeatable value. Rebuild smart, ride hard, and leave the inflated OEM prices in the dust.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eKIT INCLUDES:\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eAFTERMARKET CYLINDER BLOCK\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003e(CYLINDER BLOCK HAS A GEOMETRY, CIRCULARITY SHEET INCLUDED)\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eNAMURA NA-40015 PISTON KIT\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eNAMURA NA-40015T TOP END GASKET KIT\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eNGK D8EA SPARK PLUG\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eAFTERMARKET AIR FILTER\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003eHIFLO HF143 OIL FILTER\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eFITS:\u003c\/h3\u003e\n\u003ch3 style=\"text-align: center;\"\u003e1989 - 1991 YAMAHA MOTO-4 250\u003c\/h3\u003e","brand":"Zoom Zoom Parts","offers":[{"title":"Default Title","offer_id":49284493508831,"sku":"ZZP-A21 CYLINDER KIT","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/0741\/files\/MOTO-4_250.png?v=1779297134","url":"https:\/\/zoomzoomparts.com\/products\/1989-1990-1991-yamaha-moto-4-250-moto4-yfm250-piston-cylinder-top-end-rebuild-kit-atv-quad-1","provider":"Zoom Zoom Parts","version":"1.0","type":"link"}