Crankshaft -MALOSSI (reed valve intake) 60mm stroke, full circle web- Vespa PX200, COSA200

Preview: Crankshaft -MALOSSI (reed valve intake) 60mm stroke, full circle web- Vespa PX200, COSA200

Description

For the very first time Malossi dares to offer crankshafts for large frame engines.
The dimensions of all PX200 crankshafts are the same as those of the 125cc models. From a technical point of view, this means that the crankshaft drive is already fully utilised with the original 12 hp cylinder.
The narrow crankcase of the PX models does not allow the use of wide crank webs (urgently required for high performance). To develop a crankshaft that can withstand over three times the power (Malossi MHR cylinder) is therefore a more than technical challenge.

For a crankshaft that is as stable as possible, the crankpin and its material coverage should always be as large as possible. For this reason it is noticeable that Malossi has reduced the pin diameter from Ø22mm to Ø20mm and the crankshaft diameter from the original 97,8mm to 95mm.
Presumably to have enough cross section for the diaphragm control, which is absolutely necessary with a full cheek, even at high rpm for a corresponding amount of fresh gas available.

Fitting for: PX200, Cosa200
Material crank webs: 18NiCrMo5
Stroke: 60mm
Connecting rod length: 110mm
Lift pin: Ø20mm
Crank web diameter: Ø95mm (both sides)
Connecting rod foot width at the bottom: 14.8mm
conrod thickness: 5.6mm
crank web width at the crank pin: 11mm

The crankshaft has an M12x1.25 thread on both sides. Corresponding nuts are enclosed.
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€586.00 *

incl. VAT plus shipping costs

Available immediately (delivery time 1-3 working days*)

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Bearings
sizes:	16x20x20mm
Gudgeon pins
diameter:	16 mm
Crankshafts
stroke:	60 mm
thread rotor side:	M12x1,25 right-hand thread
thread drive side:	M12x1,5 right-hand thread
diameter crankwebs:	98 mm
diameter bearing seat rotor side:	25 mm
diameter bearing seat drive side:	25 mm
diameter oil seal seat rotor side:	24 mm
diameter oil seal seat drive side:	31 mm
full circle crankshaft:
filling material for full circle:	steel
rotary valve crankshaft:
crankcase has to be milled:
engine casing has to be modified:
Connecting rods
length connecting rod:	110 mm
diameter small end connecting rod eye:	20 mm
OEM numbers (for comparison purposes only)
Malossi	5316176, M5316176