{"product_id":"cilindro-stage6-r-t-fl-70cc-para-carter-c-one-rc-one-2fast","title":"Stage6 R\/T FL 70cc cylinder crankcase C-One \/ RC-One \/ 2Fast","description":"\u003cp\u003e\u003cstrong\u003eStage6 R\/T FL 70cc Cylinder\u003c\/strong\u003e for racing crankcases with \u003cstrong\u003eFlanged Mount (FL)\u003c\/strong\u003e fitting such as \u003cstrong\u003eMalossi C-One, RC-One, 2Fast Passion or TPR Factory\u003c\/strong\u003e. The new generation of one of the most iconic Stage6 R\/T cylinders, completely redesigned after years of development on the dyno and track.\u003c\/p\u003e\n\u003cp\u003eHere we are no longer simply talking about fitting a 70cc kit so that the scooter goes faster. The \u003cstrong\u003eR\/T FL70\u003c\/strong\u003e is designed to build a complete Racing engine around it: \u003cstrong\u003e70cc, 47.6 mm bore, original 39.3 mm stroke and 90 mm connecting rod\u003c\/strong\u003e, with an architecture designed directly for FL crankcases.\u003c\/p\u003e\n\u003cp\u003eWith the right setup, Stage6 states approximately \u003cstrong\u003e29 hp at 14,500 rpm\u003c\/strong\u003e. And what is interesting is not only the peak figure: during its development, the aim was to achieve a \u003cstrong\u003ebroad, usable powerband\u003c\/strong\u003e, avoiding an engine that only works well within an extremely narrow RPM window.\u003c\/p\u003e\n\u003cp\u003eThis is especially noticeable on the track. A broader powerband makes the engine \u003cstrong\u003eless critical with regard to variator and transmission tuning\u003c\/strong\u003e: if the RPM drops slightly when exiting a corner or temperature changes affect behaviour during a long session, the engine has more margin to remain within its effective range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe difference of an FL cylinder\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eFlanged Mount\u003c\/strong\u003e system makes it possible to work with crankcases specifically designed for high-performance Racing cylinders. Instead of trying to push a conventional crankcase beyond its limits, the assembly is designed from the outset to provide the cylinder with the space and feed it needs.\u003c\/p\u003e\n\u003cp\u003eThat is why this R\/T \u003cstrong\u003ecannot be fitted to an original crankcase\u003c\/strong\u003e. It requires a compatible FL-type crankcase, such as C-One, RC-One, 2Fast Passion or TPR Factory.\u003c\/p\u003e\n\u003cp\u003eThe cylinder uses \u003cstrong\u003e5 transfers\u003c\/strong\u003e and an exhaust port with a \u003cstrong\u003ecentral bridge\u003c\/strong\u003e. This configuration makes it possible to have a large exhaust area while keeping the piston ring under control as it passes over a large port, something especially relevant in an engine designed to operate at such high revs.\u003c\/p\u003e\n\u003cp\u003eThe body is made of \u003cstrong\u003ealuminium with Nikasil coating\u003c\/strong\u003e, a common combination in Racing engines thanks to its ability to dissipate heat and provide a durable working surface for the piston.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA cylinder head adjusted cylinder by cylinder\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStage6 does not simply fit the same insert to every unit. Each cylinder is \u003cstrong\u003emeasured taking machining tolerances into account\u003c\/strong\u003e and, depending on the result, the corresponding insert is selected from three available heights: \u003cstrong\u003e2.3 \/ 2.5 \/ 2.7 mm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt is a detail that makes quite clear the level for which this kit has been designed: ensuring that the final geometry of the assembly remains within the intended values instead of assuming that all machined cylinders are exactly the same.\u003c\/p\u003e\n\u003cp\u003eThe cylinder head is \u003cstrong\u003emodular, with a separate insert and orange anodised cover.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust designed as part of the cylinder\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe exhaust outlet uses a \u003cstrong\u003e5-axis CNC-machined manifold\u003c\/strong\u003e fixed to the cylinder by means of four bolts.\u003c\/p\u003e\n\u003cp\u003eIts function is not only to allow the exhaust to be fitted. It is designed to provide a \u003cstrong\u003eprogressive transition from the cylinder's oval outlet to the exhaust inlet\u003c\/strong\u003e, avoiding an abrupt change in section right in an area that is critical to the operation of a 2-Stroke.\u003c\/p\u003e\n\u003cp\u003eSealing is achieved by means of \u003cstrong\u003ethree O-rings\u003c\/strong\u003e: one on the cylinder side and two on the exhaust connection. This helps prevent the typical leaks of unburnt mixture and oil around the exhaust outlet that appear on many Racing engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is needed to reach those 29 hp?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe figure stated by Stage6 corresponds to a \u003cstrong\u003ecomplete and correctly tuned setup\u003c\/strong\u003e. For reference, the manufacturer developed the cylinder working with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eStage6 R\/T FL70 Exhaust.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStage6 R\/T inner rotor Ignition.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStage6 R\/T Oversize transmission.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePWK 28 mm Carburettor.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eStage6 by V-Force Reed valve.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLong gearing.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn an engine at this level, everything has to work together. It makes no sense to fit a cylinder capable of operating above 14,000 rpm and then limit it with \u003cstrong\u003ea small intake, an incorrect exhaust or a transmission unable to keep it within its powerband\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eOne of the advantages of the FL70 is that it does not force you to begin with extreme preparation of the crankcase transfers. It is designed to be \u003cstrong\u003efitted, jetted and tuned\u003c\/strong\u003e on a compatible FL crankcase. Even so, Stage6 has left enough material so that tuners who want to go further can work the cylinder and develop even more specific setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical characteristics\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Stage6 R\/T.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e FL70.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 70cc.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 47.6 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 39.3 mm \/ original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnecting rod length:\u003c\/strong\u003e 90 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGudgeon pin:\u003c\/strong\u003e 12 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e aluminium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e Nikasil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransfers:\u003c\/strong\u003e 5.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust:\u003c\/strong\u003e port with central bridge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston:\u003c\/strong\u003e 47.6 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing:\u003c\/strong\u003e 0.8 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head:\u003c\/strong\u003e modular, insert + cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable insert heights:\u003c\/strong\u003e 2.3 \/ 2.5 \/ 2.7 mm, selected by Stage6 according to cylinder tolerances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead cover:\u003c\/strong\u003e orange anodised.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust manifold:\u003c\/strong\u003e 5-axis CNC-machined.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust fastening:\u003c\/strong\u003e 4 bolts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExhaust sealing:\u003c\/strong\u003e 3 O-rings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpark plug thread:\u003c\/strong\u003e long M14.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference power:\u003c\/strong\u003e approx. 29 hp at 14,500 rpm with the proper setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting:\u003c\/strong\u003e FL-type crankcase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e competition only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStage6 R\/T FL 70cc Cylinder.\u003c\/li\u003e\n\u003cli\u003ePiston and corresponding components.\u003c\/li\u003e\n\u003cli\u003eModular Cylinder Head.\u003c\/li\u003e\n\u003cli\u003eCNC exhaust manifold.\u003c\/li\u003e\n\u003cli\u003eGaskets required for fitting.\u003c\/li\u003e\n\u003cli\u003eFitting hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e this cylinder is \u003cstrong\u003eNOT compatible with original or conventional crankcases\u003c\/strong\u003e. It must be used exclusively with a crankcase prepared for the \u003cstrong\u003eFL - Flanged Mount\u003c\/strong\u003e system.\u003c\/p\u003e","brand":"Stage6 RT","offers":[{"title":"Default Title","offer_id":67685793759623,"sku":"S6-7516615","price":469.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0860\/6223\/5959\/files\/S6-7516615_641d957e-2355-4bc2-80d4-c33946ae1137.webp?v=1792156717","url":"https:\/\/motoscoot.net\/en\/products\/cylinder-stage6-r-t-fl-70cc-for-c-one-rc-one-crankcase-2fast","provider":"Motoscoot","version":"1.0","type":"link"}