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for APRILIA 50 SR Factory
/DiTech/GILERA 50 Runner
Purejet/PIAGGIO 50 NRG MC3
Purejet/Power Purejet 2-stroke
pin 12mm,
RACE-TUNING, for professionals

These full circle crankshafts produced by the people at MALOSSI will take you to the heights of RPM heaven! A Higher Primary Compression (HPC) means higher revs and a higher top speed. Push your limits!


The central element of every motor, the crankshaft, has had high demands placed upon it by the MALOSSI technicians. To satisfy these demands all crankshafts constructed by MALOSSI have forged crank webs. As a consequence even the standard replacement version profits from high end elements, from the MALOSSI RHQ range, not normally seen on original specification items. This makes the RHQ and MHR crankshafts identical, save a few minor details. Both crankshaft types share the same stiffer, strengthened con-rods which have special alloy coatings for an ideal surface finish. The genuine high-end forged con-rods can be found included in the MALOSSI MHR Team Version crankshaft assembly. These forged items are harder, thinner and as a result lighter than cast types.


RHQ crankshafts are often used as a direct replacement for the original items, but also with mid-race cylinders and even MALOSSI MHR or Replica cylinders, according to model and compatibility. Their suitability can be checked in the product specification of every individual cylinder and the bore x stroke measurements compared. We recommend you also check the gudgeon pin dimensions as these too can differ.


The 'Team' crankshafts have been designed to be compatible with the rest of the MALOSSI Team range of components. Here also we highly recommend that you check and compare the compatibility of each component for an ideal motor set up. For added stability the inner ends of both sides of the shaft itself are also thicker. Certain peripheral components (e.g. for the variomatic) are included in the delivery.


All MALOSSI crankshafts are balanced, full circle HPC (High Primary Compression) items. The forged crank webs are manufactured using special nickel chromium molybdenum (18NiCmMo5). This alloy creates a harder surface area and also prevents oxidisation and corrosion. These improvements also have the effect of making the crank tougher and more enduring.


These are just some of the small but decisive details that make the MALOSSI crankshaft systems slightly more expensive but also a lot more robust and reliable, in all situations.


Racing Crankshaft MALOSSI RHQ/MHR RHQ

  • High Primary Compression full circle crank web crankshaft
  • Produced using 18 Ni Cr Mo 5
  • Forged monolithic rotary mass
  • Manufactured using state of the art high precision machinery and processes
  • All components of this crankshaft are multiply tempered (5 times) for high stiffness
  • Excellent surface finishing for increased durability and reliability
  • Dynamic balancing allowing motor speeds of up to 16,000 rpm
  • Copper plated 18 Ni Cr Mo 5 con rod including a high precision big end bearing
  • Suitable for higher motor rpm

SIP-TIP: Do not forget to order new bearings and oil seals to properly complete this upgrade. A suitable small end bearing is also included with this crankshaft kit. We also recommend the simultaneous replacement of the piston rings and the cylinder head gasket for full effect!

OEM Numbers (for the purpose of comparison)  5312331 (MALOSSI)

M519019 79,00 €

incl. VAT  plus shipping.
M3112044 390,00 €

incl. VAT  plus shipping.
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Crankshaft, Camshaft & Valve Kit

309,00 €
(309,00 €/Stck)
This item is in stock in sufficient quantity.

incl. VAT
plus shipping
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1.400g / piece
Stock on hand   Amount
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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
APRILIA SR DiTech 50 ZD4TE00 2T LC '03-'12
APRILIA SR DiTech GP1 50 PIAGGIO C361M 2T LC '07/03-
APRILIA SR DiTech R 50 ZD4VFB00 2T LC '04-'13
APRILIA SR R Factory 50 PIAGGIO C361M 2T LC '05
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
GILERA Runner RST Purejet 50 ZAPC462 2T LC -'05
GILERA Runner RST Purejet 50 ZAPC462 2T LC '08/05-
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
PIAGGIO NRG MC3 Purejet 50 ZAPM3200 2T LC '01-'05
PIAGGIO NRG Power Purejet 50 ZAPC452 2T LC '05-'11,00

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