{"product_id":"gy6s-137-4-naraku-scooter-performance-big-bore-cylinder-head-kit-52-4mm","title":"NARAKU SCOOTER PERFORMANCE BIG BORE CYLINDER \u0026 HEAD KIT *52.4mm*","description":"\u003cstrong\u003eNARAKU 50cc QMB139 4-STROKE 52.4mm, RACING BIG BORE CYLINDER AND HEAD KIT. KIT INCLUDES CYLINDER, PISTON, RINGS, PISTON PIN, CIR CLIPS, CYLINDER HEAD, HEAD GASKET, AND BASE GASKET.\u003c\/strong\u003e \u003cstrong\u003e \u003c\/strong\u003e \u003cstrong\u003eWHEN USED IN CONJUNCTION WITH A STOCK STROKE OF 41.4mm THE TOTAL DISPLACEMENT COMES OUT TO 89.3CC! WHEN USED WITH A 44mm STROKER CRANK \u003c\/strong\u003e \u003cstrong\u003e TOTAL DISPLACEMENT MEASURES 94.9cc!\u003c\/strong\u003e \u003cstrong\u003e \u003c\/strong\u003e \u003cstrong\u003eUPGRADES TO 89.3cc\u003c\/strong\u003e \u003cstrong\u003eCYLINDER BORE: 52.4mm\u003c\/strong\u003e \u003cstrong\u003eCYLINDER SLEEVE OUTER DIAMETER: 54.4mm \u003c\/strong\u003e \u003cstrong\u003eWRIST PIN DIAMETER: 13mm\u003c\/strong\u003e \u003cstrong\u003eTOTAL PISTON HEIGHT: 36.3mm\u003c\/strong\u003e \u003cstrong\u003eCOMPRESSION HEIGHT (FROM CENTER OF WRIST PIN HOLE TO TOP EDGE OF PISTON): 20MM\u003c\/strong\u003e \u003cstrong\u003eNON-EMISSIONS STYLE HEAD\u003c\/strong\u003e \u003cstrong\u003eINTAKE VALVE: 23mm\u003c\/strong\u003e \u003cstrong\u003eEXHAUST VALVE: 20mm\u003c\/strong\u003e \u003cstrong\u003eINTAKE PORT DIAMETER: 20.8mm\u003c\/strong\u003e \u003cstrong\u003eEXHAUST PORT DIAMETER: 18.7mm\u003c\/strong\u003e \u003cstrong\u003eUSES SHORT 64MM VALVE STEMS\u003c\/strong\u003e \u003cstrong\u003eFITS MOST MODELS OF, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR\u003c\/strong\u003e \u003cstrong\u003eAND MANY OTHERS\u003c\/strong\u003e \u003cstrong\u003e \u003c\/strong\u003e \u003cstrong\u003e \u003c\/strong\u003e \u003cstrong\u003e*PLEASE LOOK AT PHOTOS PROVIDED* \u003c\/strong\u003e \u003cstrong\u003e \u003c\/strong\u003e \u003cstrong\u003eFITS MANY MODELS LIKE JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR\u003c\/strong\u003e \u003cstrong\u003eAND MANY OTHERS\u003c\/strong\u003e","brand":"ChinesePartsPro","offers":[{"title":"Default Title","offer_id":53556423328056,"sku":"137-4","price":203.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0011\/8898\/6997\/files\/s-l1600__13332.1559774913.jpg?v=1792868586","url":"https:\/\/www.chinesepartspro.com\/products\/gy6s-137-4-naraku-scooter-performance-big-bore-cylinder-head-kit-52-4mm","provider":"ChinesePartsPro","version":"1.0","type":"link"}