{"product_id":"jp01547","title":"Naraku 47mm Performance Piston Kit – QMB139 – #NK100.63","description":"\u003cp data-start=\"256\" data-end=\"599\"\u003e\u003cstrong data-start=\"279\" data-end=\"317\"\u003eNaraku 47mm Performance Piston Kit\u003c\/strong\u003e is a high-quality replacement piston designed for \u003cstrong data-start=\"368\" data-end=\"405\"\u003eQMB139 50cc\/49cc 4-stroke engines\u003c\/strong\u003e equipped with a 47mm big bore cylinder. This kit restores lost compression and ensures smooth engine operation — ideal for rebuilds, repairs, or routine maintenance on your performance setup.\u003c\/p\u003e\n\u003cp data-start=\"601\" data-end=\"814\"\u003eWhen paired with a stock 41.4mm stroke crankshaft, this piston provides a total displacement of \u003cstrong data-start=\"697\" data-end=\"707\"\u003e72.8cc\u003c\/strong\u003e, delivering a noticeable increase in power and throttle response while maintaining everyday reliability.\u003c\/p\u003e\n\u003cp data-start=\"816\" data-end=\"831\"\u003e\u003cstrong data-start=\"816\" data-end=\"829\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"832\" data-end=\"1136\"\u003e\n\u003cli data-start=\"832\" data-end=\"889\"\u003e\n\u003cp data-start=\"834\" data-end=\"889\"\u003eGenuine \u003cstrong data-start=\"842\" data-end=\"887\"\u003eNaraku performance replacement piston kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"890\" data-end=\"952\"\u003e\n\u003cp data-start=\"892\" data-end=\"952\"\u003eDesigned for \u003cstrong data-start=\"905\" data-end=\"932\"\u003e47mm big bore cylinders\u003c\/strong\u003e (72cc conversion)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"953\" data-end=\"1027\"\u003e\n\u003cp data-start=\"955\" data-end=\"1027\"\u003ePrecision-machined aluminum piston for durability and heat dissipation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1028\" data-end=\"1088\"\u003e\n\u003cp data-start=\"1030\" data-end=\"1088\"\u003eRestores compression and maintains OEM-level reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1089\" data-end=\"1136\"\u003e\n\u003cp data-start=\"1091\" data-end=\"1136\"\u003eIdeal for rebuilds and performance upgrades\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1138\" data-end=\"1159\"\u003e\u003cstrong data-start=\"1138\" data-end=\"1157\"\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1160\" data-end=\"1450\"\u003e\n\u003cli data-start=\"1160\" data-end=\"1183\"\u003e\n\u003cp data-start=\"1162\" data-end=\"1183\"\u003eBore Size: \u003cstrong data-start=\"1173\" data-end=\"1181\"\u003e47mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1184\" data-end=\"1216\"\u003e\n\u003cp data-start=\"1186\" data-end=\"1216\"\u003eWrist Pin Diameter: \u003cstrong data-start=\"1206\" data-end=\"1214\"\u003e13mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1217\" data-end=\"1252\"\u003e\n\u003cp data-start=\"1219\" data-end=\"1252\"\u003ePiston Height: \u003cstrong data-start=\"1234\" data-end=\"1250\"\u003eApprox. 36mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1253\" data-end=\"1323\"\u003e\n\u003cp data-start=\"1255\" data-end=\"1323\"\u003eCompression Height: \u003cstrong data-start=\"1275\" data-end=\"1283\"\u003e20mm\u003c\/strong\u003e (center of wrist pin to piston crown)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1324\" data-end=\"1397\"\u003e\n\u003cp data-start=\"1326\" data-end=\"1397\"\u003eWorks with stock 41.4mm stroke crankshaft (72.8cc total displacement)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1398\" data-end=\"1450\"\u003e\n\u003cp data-start=\"1400\" data-end=\"1450\"\u003eCompatible with QMB139\/GY6 50cc 4-stroke engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1452\" data-end=\"1467\"\u003e\u003cstrong data-start=\"1452\" data-end=\"1465\"\u003eIncludes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1468\" data-end=\"1527\"\u003e\n\u003cli data-start=\"1468\" data-end=\"1478\"\u003e\n\u003cp data-start=\"1470\" data-end=\"1478\"\u003ePiston\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1479\" data-end=\"1495\"\u003e\n\u003cp data-start=\"1481\" data-end=\"1495\"\u003ePiston Rings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1496\" data-end=\"1509\"\u003e\n\u003cp data-start=\"1498\" data-end=\"1509\"\u003eWrist Pin\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1510\" data-end=\"1527\"\u003e\n\u003cp data-start=\"1512\" data-end=\"1527\"\u003eCirclips (x2)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1529\" data-end=\"1549\"\u003e\u003cstrong data-start=\"1529\" data-end=\"1547\"\u003eCompatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1550\" data-end=\"1723\"\u003e\n\u003cli data-start=\"1550\" data-end=\"1589\"\u003e\n\u003cp data-start=\"1552\" data-end=\"1589\"\u003eQMB139 50cc \/ 49cc 4-stroke engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1590\" data-end=\"1723\"\u003e\n\u003cp data-start=\"1592\" data-end=\"1723\"\u003eGY6-based scooters\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Moped Garage Hawaii","offers":[{"title":"Default Title","offer_id":40089295650934,"sku":"UP137-36","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/5361\/2855\/products\/JP01547.jpg?v=1694832595","url":"https:\/\/jppowersports.com\/products\/jp01547","provider":"Moped Garage Hawaii","version":"1.0","type":"link"}