{"product_id":"namura-standard-bore-size-b-piston-kit-for-kawasaki-stx15f-sx-r-ultra-lx-83mm","title":"Namura Standard Bore Size B Piston Kit for Kawasaki STX15F, SX-R \u0026 Ultra LX 83mm","description":"\u003ch2\u003eStandard Bore Size B Piston Kit for Kawasaki\u003c\/h2\u003e\u003cp\u003eThis Namura Standard Bore Size B Piston Kit is a high-performance replacement piston assembly designed for Kawasaki personal watercraft engines, offering reliable power and durability. It features an 83mm bore size and precision-machined construction for optimal combustion efficiency and long service life.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Namura Standard Bore Size B Piston Kit is a drop-in piston assembly for Kawasaki STX15F, SX-R, and Ultra LX models, engineered to restore lost compression and improve throttle response. Featuring a 83mm bore, this piston kit is built for both recreational and competitive use, ensuring your Kawasaki runs at peak performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-machined from high-strength aluminum alloy for reduced weight and heat dissipation\u003c\/li\u003e\n\u003cli\u003eOversized piston ring grooves accommodate high-performance ring sets for better sealing\u003c\/li\u003e\n\u003cli\u003eWrist pin and circlips included for a complete replacement assembly\u003c\/li\u003e\n\u003cli\u003ePlated skirt reduces friction and minimizes cylinder wall wear\u003c\/li\u003e\n\u003cli\u003eBalanced weight matching for smoother operation at high RPM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Kawasaki STX15F\u003c\/li\u003e\n\u003cli\u003efor Kawasaki SX-R\u003c\/li\u003e\n\u003cli\u003efor Kawasaki Ultra LX\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eUsed in personal watercraft racing and recreational riding\u003c\/li\u003e\n\u003cli\u003eIdeal for engine rebuilds requiring a stock bore replacement\u003c\/li\u003e\n\u003cli\u003eCommonly installed during top-end overhauls to restore compression\u003c\/li\u003e\n\u003cli\u003eSuitable for both fresh water and salt water environments with proper maintenance\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\u003e83mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Grade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB (Standard Bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKawasaki STX15F, SX-R, Ultra LX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, circlips\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 Will this piston kit work with aftermarket cylinders? \u003cstrong\u003eA:\u003c\/strong\u003e This kit is designed for standard bore size cylinders; if your cylinder has been bored oversize, you will need a corresponding oversized piston kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I determine the correct piston grade? \u003cstrong\u003eA:\u003c\/strong\u003e The grade letter (A, B, C, D) indicates the piston's diameter tolerance; measure your cylinder bore and select the matching grade for proper clearance.\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":44890695794774,"sku":"SZ1F12715","price":153.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/1_2f946323-8230-4450-8d99-096db07610c8.jpg?v=1781143116","url":"https:\/\/www.solidspare.com\/products\/namura-standard-bore-size-b-piston-kit-for-kawasaki-stx15f-sx-r-ultra-lx-83mm","provider":"Solid Spare","version":"1.0","type":"link"}