Aluminum cylinder set MHR Big Bore (diameter 50mm / stroke 39.3mm) - Aprilia SR50 Factory H2O 2T E2 '04-'09 (Piaggio) - Malossi

Aluminum Cylinder Set MHR Big Bore (50mm / 39.3mm) Malossi. Among the most important applications are: Aprilia SR50 Factory H2O 2T E2 2004-2009 (Piaggio) / SR50 Factory H2O 2T E2 2010-2014 (Piaggio) / SR50 Racing H2O 2T E2 07/2003-2008 (Piaggio) / SR50 Sport H2O 2T E2 07/2003-2008 (Piaggio) / SR50 Street H2O 2T E2 07/2003-2008 (Piaggio) / SR50 Street H2O 2T E2 2009-2012 (Piaggio) / Derbi GP1 50 H2O 2T E1 2001-2003 (Piaggio) / GP1 Open 50 H2O 2T E2 2006-2009 (Piaggio) / GP1 Race 50 H2O 2T E2 2005-2007 (Piaggio) / Gilera DNA 50 H2O 2T E1 2000-2001 / DNA 50 H2O 2T E2 2002-2004 / DNA RST 50 H2O 2T E2 2005-2006 / Runner DD 50 H2O 2T E1 1998-2001 / Runner DT 50 H2O 2T E1 1998-2001 / Runner FL 50 H2O 2T E2 2002-2004 / Runner SP 50 H2O 2T E2 2002-2004 / Runner SP RST 50 H2O 2T E2 2005-2006 / Runner SP RST 50 H2O 2T E2 2007 / Runner SP RST 50 H2O 2T E2 2008-2009 / Runner SP RST 50 H2O 2T E2 2010-2017 / Piaggio NRG 50 H2O 2T 1994-1996 / NRG MC2 50 H2O 2T 1997 / NRG MC2 DD 50 H2O 2T 1998 / NRG MC2 DT 50 H2O 2T 1998 / NRG MC2 Extreme 50 H2O 2T E1 1999-2000 / NRG MC3 DD 50 H2O 2T E1 2001-2004 / NRG Power DD 50 H2O 2T E2 2004-2006 / NRG Power DD 50 H2O 2T E2 2007-2017 / NTT 50 H2O 2T 1994-1996 / Quartz 50 H2O 2T 1991-1994 / Zip SP 50 H2O 2T 1996-2000 / Zip SP2 50 H2O 2T E1 2001-2005 / Zip SP2 50 H2O 2T E2 2006-2013.

- Cylinder set for liquid-cooled engine;
- The new Big Bore cylinder set Ø 50 comes from the technology of the famous Malossi cylinders with 7 ports;
- Cylinder with 7 ports, gravity cast in aluminum alloy;
- Cylinder casing coated with cermetal;
- Piston ring made of KDN5 cast iron Ø 50 x 0.8;
- Modular cylinder head made of primary aluminum alloy;
- Big Bore cylinder sets must be used only with Malossi crankshaft;
- Includes cylinder head;
- Bore: 50 mm;
- Piston pin diameter: 12 mm;
- Stroke: 39.3 mm;
- Class: race;
- Engine displacement: 77.00 cc.

Note: to provide the necessary rigidity to the cylinder set, the cylinder has an inlet diameter into the crankcase of 56.2 -0.1 / -0.2 mm. Therefore, it is necessary to bore the crankcase with a boring bar of 56.7 + 0.0 / 0.1 mm to a depth of 21 mm.

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