{"product_id":"cilindro-brk-racing-74cc-derbi-variant-start-sin-culata-new","title":"Cylinder BRK Racing 74cc Derbi Variant Start without cylinder head NEW ","description":"\u003cp\u003e\u003cstrong\u003eCylinder\u003c\/strong\u003e \u003cstrong\u003eBRK\u003c\/strong\u003e Racing NEW 74cc for \u003cstrong\u003eDerbi\u003c\/strong\u003e Variant Start.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eBRK Racing Cylinder 74cc\u003c\/strong\u003e is a direct evolution from \u003cstrong\u003eBarikit\u003c\/strong\u003e's competition experience, designed to transform the performance of the legendary \u003cstrong\u003eDerbi Variant Start\u003c\/strong\u003e engine (pedal and Start 5 versions). This high-performance \u003cstrong\u003ecylinder\u003c\/strong\u003e is made entirely of \u003cstrong\u003ealuminium\u003c\/strong\u003e with an internal nicasil coating, ensuring excellent heat dissipation and superior durability compared to iron cylinders.\u003c\/p\u003e\n\u003cp\u003eTechnically, it is a very advanced cylinder. Its \u003cstrong\u003e47.6mm\u003c\/strong\u003e diameter, combined with the engine's original stroke, increases the actual displacement to 74cc. The internal layout is purely racing: it features \u003cstrong\u003e6 load transfers\u003c\/strong\u003e of generous size that optimise the filling of the cylinder and an \u003cstrong\u003eexhaust port with two additional boosters\u003c\/strong\u003e. This configuration allows for extremely fast gas evacuation, which is essential for reaching high revs and high power. The kit is completed with a \u003cstrong\u003esingle-ring piston\u003c\/strong\u003e, which minimises friction, and a new blue graphite finish that improves lubrication during running-in and reduces the risk of seizure. It is important to note that, due to its competition-oriented design, this cylinder does not include a cylinder head and must be installed with the \u003cstrong\u003eBRK cylinder head ø47.6mm\u003c\/strong\u003e, as it is not compatible with the standard one.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cylinder made of \u003cstrong\u003ealuminium\u003c\/strong\u003e with nicasil coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e \u003cstrong\u003e47.6 mm\u003c\/strong\u003e (actual displacement of 74cc).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLayout:\u003c\/strong\u003e \u003cstrong\u003e6 load transfers\u003c\/strong\u003e and exhaust port with central divider and \u003cstrong\u003e2 boosters\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston:\u003c\/strong\u003e \u003cstrong\u003eSingle-ring\u003c\/strong\u003e (1 ring only) to minimise friction and maximise RPM. Blue graphite finish.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston pin:\u003c\/strong\u003e 12mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Specific for \u003cstrong\u003eDerbi Variant Start\u003c\/strong\u003e (pedal engine) and \u003cstrong\u003eDerbi Variant Start 5\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommendations:\u003c\/strong\u003e It should be installed together with a larger diameter carburettor (21mm or above), a competition exhaust, and a reinforced crankshaft to make the most of its potential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eAttention!\u003c\/span\u003e You must purchase and install the cylinder head with reference CUL-1037-HC.\u003c\/strong\u003e\u003c\/p\u003e","brand":"BRK Racing","offers":[{"title":"Default Title","offer_id":55003482227073,"sku":"CIL-1037-HC","price":175.11,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/CIL-1037-HC.webp?v=1763719056","url":"https:\/\/motoscoot.net\/en\/products\/cylinder-brk-racing-74cc-derbi-variant-start-without-cylinder-head-new","provider":"Motoscoot","version":"1.0","type":"link"}