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Crankshaft -MALOSSI MHR Big Bore 44mm stroke, 85mm conrod- Piaggio 50cc 2-stroke (for 13mm gudgeon pin)

This item is currently not available.
€370.80 * €412.00 * (10% off)

incl. VAT plus shipping costs

The item is ordered and will be in stock soon
sizes: 13x17x17,5mm
Gudgeon pins
diameter: 13 mm
stroke: 44 mm
thread rotor side: M12x1,25 right-hand thread
thread drive side: M12x1,25 right-hand thread
diameter crankwebs: 75.4 mm
width crankwebs: 41 mm
diameter bearing seat rotor side: 20 mm
diameter bearing seat drive side: 20 mm
diameter oil seal seat rotor side: 19 mm
diameter oil seal seat drive side: 18 mm
full circle crankshaft:
filling material for full circle: steel
material balancing weights: aluminium
rotary valve crankshaft:
crankcase has to be milled:
engine casing has to be modified:
diameter variator pivot: 14.8 mm
variator pivot type: toothed
can be used with genuine variator: yes
Connecting rods
length connecting rod: 85 mm
thickness connecting rod: 3.4 mm
diameter small end connecting rod eye: 17 mm
lubricating hole at small end bearing: yes
diameter crankpin: 18 mm
lubricating hole at crankpin bearing: slot
crankpin shims: yes
Please inform me once the product is available again.
P For this item you get fidelity point/s
High-end racing crankshaft for Malossi’s Big Bore kits! HPC full-circle shaft for increased...Continue reading


High-end racing crankshaft for Malossi’s Big Bore kits!

  • HPC full-circle shaft for increased primary compression -> increased performance
  • 44mm long-stroke
  • 85mm con-rod
  • 13mm piston pin
  • Optimised vario taper which may only be used with the MHR variator, the matching guide cover and bush are included in delivery
  • Best Malossi quality - Made in Italy!

In order to realise the increased stroke, Malossi’s engineers enlarged the crank web’s diameter. Therefore, you will need to machine your crankcase to 76.5mm.

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