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Full Circle Crankshaft MAZZU..

..CCHELLI for Vespa 50/N/L/R/S
reed valve, stroke 43,0mm, conrod 87,0mm,
cone 19/20mm, M10

Full Circle Crankshafts are used in motors with direct intake racing cylinders or in connection with reed valve intakes. A Full Circle Crankshaft boosts rpm's in all ranges, motors show more pep and agility with a higher power output. This high quality Full Circle Crankshaft from Italian manufacturer MAZZUCCHELLI, has minimal manufacturing tolerances and reduced bearing play. A real guarantee for stability in high rpm ranges and absolute durability.


A Full Circle Crankshaft, in comparison to original crankshafts, has a closed shaft flange. Precompression is higher, crankcase turbulence is reduced. A polished edged connecting rod and lower con rod bearing as silver bearing meet highest requirements. All crankshafts are delivered with upper connecting rod bearing. Ideal usage in connection with direct intakes such as the MALOSSI 136 cc or PARMAKITS. When used with other cylinders, a reed valve manifold is necessary, This also requires the crankcase intake to be enlarged to fit, so the closed flange doesn't close the intake completely. In older 50 cc motors, the precompression plate is often defect. Another situation where a reed valve manifold with a full circle crankshaft can save a crankcase from being thrown away.


Conclusion: Extremely durable and high quality. Full circle crankshafts are a must for cylinders with direct intake such as MALOSSI, PARMAKIT, and QUATTRINI or for highly modified casing intakes for the POLINI 130 cc.


SIP Community User "real_himself":

"Super part. Perfect for the 136cc Malle, when driven with direct intake."


Full circle crankshaft / stroke 43mm / connecting rod 87mm / 19/20mm, M10 

Full circle crankshaft with Ø 82mm crankweb (flywheel side), Ø 87mm crankweb (rotary valve side), 87mm connecting rod, lower connecting rod bearing = silver bearing, oil seal housing 19mm, bearing housing 20mm, pointed cone with M10mm thread, incl. connecting rod bearing


SIP-TIP: New bearings, oil seals and keys are a must. Same goes for sealing kit, clutch-, and flywheel nuts. It also makes sense to use the crankshaft tools # 27338000, # 21071000 and # 18119000. You?ll also need a POLINI, MALOSSI or HHP reed valve manifold.

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Spare Parts
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 50 / N 50 V5A1T 2T AC `63-`71
VESPA 50 L 50 V5A1T 2T AC `66-70
VESPA 50 R 50 V5A1T 2T AC `69-`83
VESPA 50 Revival 50 V5R1T 2T AC `90-
VESPA 50 S 50 V5SA1T 2T AC `63-`84 (N)
VESPA 50 S 50 V5SA1T 2T AC `63-`84
VESPA 50 Special 50 V5A2T 2T AC '69-'72
VESPA 50 Special 50 V5B1T 2T AC '72-'75
VESPA 50 Special 50 V5B3T 2T AC '75-'83
VESPA 50 Special Elestart 50 V5B4T 2T AC '75-'76
VESPA 50 Special Elestart 50 V5B2T 2T AC `72-`75
VESPA 50 Special Elestart 50 V5A3T 2T AC '69-'72
VESPA 50 SR / Sprinter 50 V5SS2T 2T AC `71-`79
VESPA 50 SS / Super Sprint 50 V5SS1T 2T AC `65-`71
VESPA PK 50 50 V5X1T 2T AC `82-`84 -> 14531 (small cone)
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84 -> 181678 (small cone)
VESPA PK 50 S / Elestart 50 V5X2T 2T AC `82-`84 3000001 -> 3007754, (electric start)
VESPA PK 50 S Lusso / Elestart 50 V5X2T 2T AC `85-`88 -> 181678 (small cone)

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