{"product_id":"cilindro-aprilia-sxr-50-4t-euro5-polini","title":"Polini Cylinder 75cc Aprilia SXR 50 4T \u003e2021","description":"\u003cp\u003e\u003cstrong\u003eCylinder\u003c\/strong\u003e \u003cstrong\u003e75cc\u003c\/strong\u003e from manufacturer \u003cstrong\u003ePolini\u003c\/strong\u003e for \u003cstrong\u003eAprilia\u003c\/strong\u003e SXR 50 4T \u0026gt;2021.\u003c\/p\u003e\n\u003cp\u003eReplacing the \u003cstrong\u003eoriginal 49cc cylinder\u003c\/strong\u003e with a \u003cstrong\u003e75cc cylinder\u003c\/strong\u003e on a \u003cstrong\u003e4-stroke\u003c\/strong\u003e motorcycle is one of the most effective upgrades to gain \u003cstrong\u003epower and torque\u003c\/strong\u003e. With this increase in displacement, the motorcycle achieves \u003cstrong\u003ebetter acceleration, higher top speed, and improved performance on inclines\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased engine power and response.\u003c\/li\u003e\n\u003cli\u003eGreater torque, ideal for hills and extra load.\u003c\/li\u003e\n\u003cli\u003eBetter fuel utilization and thermal efficiency.\u003c\/li\u003e\n\u003cli\u003eCompatible with original systems, no complex modifications required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you are looking for \u003cstrong\u003emore power without losing reliability\u003c\/strong\u003e, installing a \u003cstrong\u003e75cc cylinder\u003c\/strong\u003e on your \u003cstrong\u003e49cc 4-stroke motorcycle\u003c\/strong\u003e is the best option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eADDITIONAL INFORMATION\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWARRANTY\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBefore installing the \u003cstrong\u003ePolini kit\u003c\/strong\u003e, it is essential to read the \u003cstrong\u003ewarranty\u003c\/strong\u003e certificate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eASSEMBLY\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecord the \u003cstrong\u003etiming regulation data\u003c\/strong\u003e before disassembling the engine.\u003c\/li\u003e\n\u003cli\u003eCheck the condition of \u003cstrong\u003ebearings, crankshaft, and pin\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eClean \u003cstrong\u003ecylinder, piston, and pin\u003c\/strong\u003e with gasoline, dry, and oil them.\u003c\/li\u003e\n\u003cli\u003eInstall the piston, securing the pin clips and correctly positioning the rings (\u003cstrong\u003eletter \"N\" facing the cylinder head\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli\u003eSelect the appropriate \u003cstrong\u003ebase gasket\u003c\/strong\u003e according to the manufacturer and install the cylinder.\u003c\/li\u003e\n\u003cli\u003eTighten the cylinder head \u003cstrong\u003ediagonally\u003c\/strong\u003e with a torque of 1.2 Kgm.\u003c\/li\u003e\n\u003cli\u003eCheck and correct the \u003cstrong\u003ecylinder head surface\u003c\/strong\u003e if necessary.\u003c\/li\u003e\n\u003cli\u003eCheck and adjust the \u003cstrong\u003evalves\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBREAK-IN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor \u003cstrong\u003e500 km\u003c\/strong\u003e, avoid exceeding \u003cstrong\u003e¾ throttle\u003c\/strong\u003e and \u003cstrong\u003eoverstraining\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDo not demand \u003cstrong\u003emaximum power when cold\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eADJUSTMENT AND RECOMMENDATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCheck the thickness of the original gasket and choose the most suitable one.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAdjust the valve clearance (\u003cstrong\u003e0.10 mm intake \/ 0.15 mm exhaust\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli\u003eUse the \u003cstrong\u003eECM 171.0022 unit\u003c\/strong\u003e following the instructions.\u003c\/li\u003e\n\u003cli\u003eIf the variator is original, install the \u003cstrong\u003ePolini 7g rollers\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eProper assembly and the use of \u003cstrong\u003eoriginal Polini spare parts\u003c\/strong\u003e ensure a \u003cstrong\u003emore durable and efficient engine\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #006bb5;\"\u003e\u003ca href=\"https:\/\/www.motoscoot.net\/blog\/wp-content\/uploads\/2025\/02\/inst_140.0237.pdf\" target=\"_blank\"\u003e\u003cspan style=\"color: #006bb5;\"\u003e\u003cstrong\u003eAssembly instructions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Polini Motori s.p.a.","offers":[{"title":"Default Title","offer_id":54308098736513,"sku":"140.0237","price":222.16,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/140.0237.jpg?v=1750292976","url":"https:\/\/motoscoot.net\/en\/products\/cylinder-aprilia-sxr-50-4t-euro5-polini","provider":"Motoscoot","version":"1.0","type":"link"}