DescriptionLong Stroke Crankshaft MAZZUCCHELLIfor Vespa 200 Rally VSE1T 33997 ->/P200E/PX200 E/Lusso/MY/Cosadisc valvestroke 60,0mmconrod 110,0mmStandard - con rodConnecting rod bearing: 16x20x20 mmpin 16mmvalve timing: 138°/6° post TDCDescriptionSport crankshaft from Mazzucchelli with 60mm stroke ( 3mm compared to series). It is an ideal complement to all sport and racing cylinders. The long intake timing after top dead centre ensures that in the lowest speed range much of the mixture already sucked in is pushed back through the carburettor (so called This causes the mixture to be heavily greased and the engine runs unevenly and stutters. The ideal companion for this wave is therefore a larger carburettor which is inevitably accompanied by a longer intake stroke with this type of engine. This dampens the spitting back into the carburettor already relatively strongly, an additional mounted resonance chamber (so-called Boost Bottle) facilitates the adjustment of the engine additionally. The larger carburettor cross section fits well to the long control angles of the shaft and makes a strong performance increase possible in the upper speed range opposite early closing crankshafts. Unfortunately also with losses in the engine elasticity. The Mazzuchelli shaft does not erect the same width at the rotary vane control cheek and at the shaft seal seat as the BGM shafts. Therefore the control slot in the engine housing cannot be widened as much as with a BGM crankshaft.The additional stroke must be compensated for on cylinders designed for the standard stroke of 57mm. For this purpose use either a 1.5mm head OR a 1.5mm foot gasket. It is not necessary to work with a 3mm gasket. The additional stroke of 3mm is distributed over 1.5mm in the lower dead centre direction and 1.5mm in the upper dead centre direction.A foot gasket increases the control angle of the cylinder and thus provides the prerequisite for a sporty and speed-oriented power delivery. For full power, however, the exhaust angle must often be increased to compensate for the disproportionately increased overcurrent angle compared to the exhaust angle. For everyday engines it is usually recommended to compensate the stroke with a 1.5mm head gasket.Cylinders designed for 60mm stroke (Polini 221, Pinasco 225) do not require an additional compensating gasket.stroke: 60mmcross rod length: 110mmengines: PX200, Cosa200, Rally200 (Ducati ignition)clevis: 20mm (solid material)Necessary stroke compensation: 1,5mm (foot or head for cylinders for 57mm stroke)Bearingssizes:16x20x20mmGudgeon pinsdiameter:16 mmCrankshaftsstroke:60 mmthread rotor side:M12x1,25 right-hand threadthread drive side:M12x1,5 right-hand threaddiameter crankwebs:98 mmwidth crankwebs:40.1 mmdiameter bearing seat rotor side:25 mmdiameter bearing seat drive side:25 mmdiameter oil seal seat rotor side:24 mmdiameter oil seal seat drive side:31 mmfull circle crankshaft:norotary valve crankshaft:yeslength rotary crankweb:196 mmVespa PX200 - intake timing for short rotary surface (46mm) (°):184Vespa PX200 - intake timing for long rotary surface (62mm fully modified) (°):203crankcase has to be milled:noengine casing has to be modified:noConnecting rodslength connecting rod:110 mmthickness connecting rod:5.6 mmdiameter small end connecting rod eye:20 mmlubricating hole at small end bearing:nodiameter crankpin:20 mmlubricating hole at crankpin bearing:notchcrankpin shims:yesFits the following vehiclesVespa (Motovespa) Vespa 200 DN (engine 9DN)Vespa (Piaggio) Vespa 200 Rally (VSE1T, Ducati)Vespa (Piaggio) Cosa 200 CL (VSR1T)Vespa (Piaggio) Cosa 200 CLX (VSR1T300)Vespa (Piaggio) Cosa 200 FL (VSR1T301)Vespa (Piaggio) P 200 E (VSX1T, -1980)Vespa (Piaggio) PX 200 E FL (VSX1T, 1984-1997)
