{"product_id":"polini-big-bore-kit-vespa-primavera-lx-50-fly-50-p50","title":"Polini 78.8cc Big Bore Kit | Vespa Piaggio 4T 50cc Engines","description":"\u003cp\u003eBump your Piaggio 4T 50cc scooter to \u003cstrong\u003e78.8cc\u003c\/strong\u003e with the \u003cstrong\u003ePolini Big Bore Kit\u003c\/strong\u003e. Designed for 4-stroke 2-valve and 4-valve 49cc Piaggio engines, this complete kit includes a finned aluminum alloy cylinder, flat-top piston, full gasket set, and all hardware needed for the bore-up. The 11.6:1 compression ratio delivers a significant increase in mid-range and top-end power, and the included gear-up ratio (14:43) provides a 60% increase over stock (11:54) for improved top speed.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFor off-road and closed-course competition use only. Not intended for use on public roads or land. Not legal for use in California on pollution-controlled vehicles. Performance upgrades are not covered under warranty.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eKit Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFinned aluminum alloy cylinder (78.8cc bore)\u003c\/li\u003e\n\u003cli\u003eFlat-top piston\u003c\/li\u003e\n\u003cli\u003ePiston rings (3-ring set)\u003c\/li\u003e\n\u003cli\u003eCirclips (x2)\u003c\/li\u003e\n\u003cli\u003eWrist pin and dowel pins\u003c\/li\u003e\n\u003cli\u003eHead gasket (green composite)\u003c\/li\u003e\n\u003cli\u003eBase gasket (black)\u003c\/li\u003e\n\u003cli\u003eExhaust gasket\u003c\/li\u003e\n\u003cli\u003eRubber intake manifold spacers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIncreases displacement from 49cc to 78.8cc on Piaggio 4T 2-valve and 4-valve engines\u003c\/li\u003e\n\u003cli\u003e11.6:1 compression ratio for significant mid-range and top-end power gains\u003c\/li\u003e\n\u003cli\u003e14:43 gear-up ratio — 60% increase over stock 11:54 for improved top speed\u003c\/li\u003e\n\u003cli\u003eComplete kit: aluminum cylinder, piston, rings, circlips, wrist pin, full gasket set, and intake spacers\u003c\/li\u003e\n\u003cli\u003eMade in Italy by Polini — Polini P\/N 140.0223\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDisplacement: 78.8cc\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 11.6:1\u003c\/li\u003e\n\u003cli\u003eGear-Up Ratio: 14:43 (60% increase over stock 11:54)\u003c\/li\u003e\n\u003cli\u003eCylinder Material: Aluminum alloy\u003c\/li\u003e\n\u003cli\u003ePolini Part Number: 140.0223\u003c\/li\u003e\n\u003cli\u003eMade in Italy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVespa LX 50 (2006–2009) — 4-stroke 2-valve\u003c\/li\u003e\n\u003cli\u003eVespa LX 50 (2010–2014) — 4-stroke 4-valve\u003c\/li\u003e\n\u003cli\u003eVespa S 50 (2009–2014) — 4-stroke 4-valve\u003c\/li\u003e\n\u003cli\u003eVespa Primavera 50 4V Carb (2015–2019)\u003c\/li\u003e\n\u003cli\u003eVespa Sprint 50 4V Carb (2015–2019)\u003c\/li\u003e\n\u003cli\u003ePiaggio Fly 50 (4T)\u003c\/li\u003e\n\u003cli\u003eScootcoupe P50\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":67964645507393,"sku":"1100-1467","price":308.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-9380-0-1100-1467_6b28e493-f667-4445-8af5-20d499914367.jpg?v=1792558037","url":"https:\/\/azscooterparts.com\/products\/polini-big-bore-kit-vespa-primavera-lx-50-fly-50-p50","provider":"AZScooterParts","version":"1.0","type":"link"}