{"product_id":"gruppo-termico-big-deps-75cc-47mm-con-spinotto12mm-in-alluminio-per-piaggio-ciao-malossi","title":"Malossi BIG DEPS 75cc 47mm Thermal Unit with 12mm Pin in Aluminum for Piaggio Ciao","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eAfter the great success of the Piaggio crankcases, Malossi completes the job: the Ø 47 BIG DEPS aluminum cylinder kits are once again available!\u003cbr\u003e\u003cbr\u003eThe only cylinders on the market for CIAO\/SI with split exhaust and symmetrical transfer ports!!!!\u003cbr\u003e\u003cbr\u003eThe exhaust connector is screwed and offers two great advantages:\u003cbr\u003e\u003cbr\u003eExtreme resistance and possibility of replacement in case of breakage\u003cbr\u003ePossibility to increase the exhaust outlet, further increasing performance\u003cbr\u003eThese results were made possible by the decompression valve supplied in the kit, which is smaller than the original Piaggio one.\u003cbr\u003e\u003cbr\u003eThe head has a central hemispherical combustion chamber.\u003cbr\u003e\u003cbr\u003eMalossi BIG DEPS aluminum cylinder kits represent the maximum balance between performance and component durability! The BIG DEPS have been designed and manufactured with the precise objective of obtaining cylinder kits capable of guaranteeing high reliability together with the improvement of the internal thermo and fluid dynamic systems.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eTHE CYLINDER\u003cbr\u003e\u003cbr\u003eMade with the same high-strength aluminum alloy as our racing cylinders and a nickel-chromium plated barrel. The central core has been re-profiled at the transfer ports to have a larger heat exchange surface and better cooling air flow fluidity to allow the fresh charge to enter the combustion chamber at optimal temperature and pressure conditions, thus improving the engine's volumetric efficiency. On the front of the cylinder there is a machined and finished support surface with high-precision tools, with 4 threaded holes necessary for connecting the manifold assembly.\u003cbr\u003e\u003cbr\u003eThe most important innovation is represented by the completely redesigned internal porting, specifically studied to obtain cylinder scavenging, maximizing power at the correct operating speed. This has led to a great increase in performance throughout the engine's operating range, making it more powerful and at the same time more brilliant in torque delivery, without neglecting better temperature control in the combustion chamber, avoiding unpleasant overheating.\u003cbr\u003e\u003cbr\u003eTHE CYLINDER KIT\u003cbr\u003e\u003cbr\u003eThe new 2018 range offers wide interchangeability, producing a series with a piston with a Ø 10 pin (if the user wants to keep their standard crankshaft or mount the Malossi 53 7313) and a series with a piston with a Ø 12 pin for high-strength crankshafts such as the Malossi 53 1802 RHQ.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eGASKETS\u003cbr\u003e\u003cbr\u003eThe gasket bag is supplied with a new 0.5 mm head gasket, no longer made of aluminum but of ANNEALED COPPER: a material with a higher thermal transmission coefficient than aluminum, thanks to which a greater amount of heat can be transferred from the combustion chamber to the cooling fins, thus keeping the temperatures in the chamber more controlled. Greater permeability to heat flow also helps to prevent a consequent increase in its lifespan, also avoiding mixture leaks from the head. The base gasket has been designed to couple with the new cylinder shape dictated by the redesigned transfer ports and is supplied in 3 different thicknesses to allow the user to use different compression ratios than those recommended to obtain different engine tunings based on their uses and experience.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eEXHAUST MANIFOLD\u003cbr\u003e\u003cbr\u003eConnection to the muffler is made possible by a fitting secured by a flange coupled to a specially made profile in the cylinder and connected to it by 4 screws. By adopting this solution, just as in racing cylinders, it has been possible to solve all loosening problems due to vibrations, regardless of the power achieved. The new flange, made of blued steel, also has two spring housing ears to connect custom mufflers without having to drill holes in the cylinder fins. Excellent sealing is ensured by an O-ring placed on the coupling surface of the fitting, which prevents any oil residues from dripping from the exhaust outside the cylinder. Each kit comes with two different manifolds: one for mounting original mufflers or those with the same coupling dimensions, and one with larger internal and external dimensions for an unrestricted exhaust, which, coupled with more sporty mufflers, allows for the achievement of maximum power and torque values.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eTechnical Features\u003cbr\u003e\u003cbr\u003eSplit exhaust\u003cbr\u003eSymmetrical transfer ports\u003cbr\u003eHead with central hemispherical combustion chamber\u003cbr\u003eReduced decompression valve\u003cbr\u003eTiming: 6 transfer ports\u003cbr\u003eCylinders obtained by gravity casting in specific steel molds\u003cbr\u003eMaterial: high silicon content tempered and stabilized primary aluminum alloy\u003cbr\u003eMachined on high-precision numerical control machine tools\u003cbr\u003eBarrel with silicon carbide coating in an electrolytic nickel matrix and cross-honed with diamond passes with very tight tolerances\u003cbr\u003eRecalculated heat exchange surfaces\u003cbr\u003eExhaust ports and transfer ports studied and fine-tuned for maximum thermodynamic efficiency\u003cbr\u003eHigh mechanical strength spheroidal cast iron rings with hard anti-wear chromium plating on the contact surface, ground and lapped\u003cbr\u003eDimensional and roughness checks\u003cbr\u003ePiston-cylinder coupling: selections of 0.010-0.005 mm\u003cbr\u003e100% hydraulic seal checks\u003cbr\u003e2 muffler connections; oversized Ø 27 - standard Ø 22\u003cbr\u003eBIG DEPS cylinder kits: the perfect match for the Malossi crankcase!\u003c\/span\u003e\u003c\/p\u003e","brand":"Malossi","offers":[{"title":"Default Title","offer_id":53566895554898,"sku":"3117421","price":253.0,"currency_code":"CHF","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0945\/3771\/1954\/files\/gruppo-termico-big-deps-75cc-47mm-con-spinotto12mm-in-alluminio-per-piaggio-ciao-malossi_3f3af518-d52b-46c4-99d0-c72c1e8b7b9c.jpg?v=1780928321","url":"https:\/\/mymoped.ch\/en\/products\/gruppo-termico-big-deps-75cc-47mm-con-spinotto12mm-in-alluminio-per-piaggio-ciao-malossi","provider":"MyMoped","version":"1.0","type":"link"}