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Malossi MHR Crankcase RC-One Piaggio ZIP / NRG

Malossi Item no.: M5715845

Malossi MHR Crankcase RC-One Piaggio ZIP / NRG

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Data Sheet
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Malossi has taken the design of performance parts to the next level. The introduction of their Malossi Crankcase Kit RC-One has revolutionized scooter tuning by presenting innovative technology ready to house the latest and newest racing components.

To date, riders were forced to equip their tuned racing scooters with original or OEM quality crankcases that were designed for limited power and performance. They had to modify these crankcases so they were capable of dealing with the requirements and strain of 70cc and more powerful engines. But times are a-changing, and Malossi's RC-One crankcase, developed and manufactured in Malossi's Research & Development centre, represents a milestone in building the ultimate racing engine.

Malossi basically started from scratch, discarding traditional concepts in crankcase design, and came up with a completely redesigned transfer and inlet port area with short stud bolts while at the same time increasing structural rigidity.

Special attention was paid to the reed valve area - employing the newest CFD (Computational Fluid Dynamics) software, Malossi engineers were able to calculate and design optimum angles and dimensions for reed valve placement.

They got rid of auto-lubrication and traditional water pump technology in order to minimize power loss, a pre-drilled opening allows for the use of a vacuum fuel pump. The opening for the electric starter was closed. Shock absorber mounting was redesigned and reinforced.

The RC-One was designed for Malossi MHR 70cc / 94cc cylinders with special 'flange mount' system. The crankcase can be used with disc and drum brakes.

If you are into high-end equipment - this is it!

Technical specifications:

  • Material: die-cast aluminium silicon alloy
  • Weight: 5.25kg
  • Spacing crankshaft - primary shaft: 270mm
  • Stud bolt spacing: 48x48mm
  • Crankshaft bearing: 20x47x14mm
  • Wheel axle bearing: 20x47x14mm
  • Needle bearing for transmission cover: 16x22x12mm
  • 360° manifold for VHST and PWK carburetors
  • Reed valve: VL18
  • Cylinder base seat: 61mm
  • Pump casing bore: 78mm
  • Stud bolts: 8.8 tempered steel
  • Suitable for: Piaggio short and long

Data Sheet

Name Malossi MHR Crankcase RC-One Piaggio ZIP / NRG
Item No. M5715845
Brand Malossi

Your product goes with the following manufacturers and their models:


Mojito Custom 50cc (Piaggio engine)

SR 50cc Funmaster LC (after 07/2003) - Piaggio engine

SR 50cc LC (after 07/2003) - Piaggio Engine

SR 50cc R Factory i.e. LC (after 2005) - Piaggio Engine

SR 50cc R LC (after 2005) - Piaggio Engine

SR 50cc Racing LC (after 07/2003) - Piaggio Engine

SR 50cc Sport LC (after 07/2003) - Piaggio Engine

SR 50cc Street LC (after 07/2003) - Moteur Piaggio

SR Motard 50cc (after 2011)

Scarabeo 50cc AC (2005-2006) (Piaggio engine)

Sportcity Street 50cc


Atlantis 50cc AC (after 06/2002) - Piaggio

Atlantis 50cc LC (after 06/2002) - Piaggio

Bullet 50cc AC - Piaggio

GP1 50cc LC - Piaggio

GP 1 Open 50cc

GP1 Racing / Revolution 50cc LC - Piaggio

GP 1 Racing 50cc

GP 1 Replica 50cc

GP 1 Revolution 50cc


DNA 50cc LC

Easy Moving 50cc AC

Ice 50cc AC

Runner 50cc LC (1999 - 2000)

Runner 50cc LC (after 2004)

Runner 50cc LC (before 1999)

Runner 50cc LC CAT (after 2001)

Runner SP 50cc LC (after 08/2004)

Stalker 50cc AC (after 1999)

Stalker 50cc AC (before 1999)

Stalker Naked 50cc

Storm 50cc AC

Typhoon 50cc AC (before 2011)

Typhoon X 50cc AC (before 2011)


Jet Set 50cc AC

Torpedo 50cc AC - Piaggio


Diesis 50cc AC

Fly 50cc AC

Free 50cc AC (after 1999)

Free 50cc AC (before 1999)

Liberty 50cc AC

NRG 50cc LC

NRG Power DD 50 (after 2005)

NRG Power DT 50cc AC (after 2005)

NRG mc2 50cc LC (after 1998)

NRG mc2 50cc LC (before 1998)

NRG mc2 DD 50cc LC (after 1998)

NRG mc2 Extreme 50cc AC

NRG mc2 Extreme 50cc LC

NRG mc3 DD 50cc LC CAT

NRG mc3 DT 50cc AC CAT

NTT 50cc LC

Quartz 50cc LC

Sfera 1st series 50cc AC (1991 - 1994)

Sfera NSL 50cc AC

Sfera RST 50cc AC

Storm 50cc AC

Typhoon (TPH) 50cc AC (after 2010)

Typhoon (TPH) 50cc AC (before 2010)

Typhoon X (TPH X) 50cc AC (before 2010)

Vespa S 50cc 2-stroke AC

Zip 1st series 50cc AC (1991 - 1994)

Zip 2 50cc AC CAT (after 1999)

Zip 2 50cc AC as from 2009 (LBMC25E)

Zip 2 SP 50cc LC

Zip Base 50cc AC (after 1999)

Zip Base 50cc AC (before 1999)

Zip FastRider 50cc AC

Zip RST 50cc AC (1996-2000)

Zip SP 50cc LC

Zip SSL 25 (after 1999)

Zip SSL 25 (before 1999)


ET2 50cc AC ZAPC 16000

ET2 50cc AC after 2000 ZAPC38100

LX 50cc AC - 2-stroke

LXV 50cc 2-stroke AC

Primavera 50cc 2T AC after 13

S 50cc 2T AC after 07

Sprint 50cc 2T AC after 14

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