INTAKE MANIFOLDS

Intake manifold conveys the air-fuel mixture to the engine by means of reed valve.

The total efficiency of an engine is calculated as the product of various partial efficiencies, such as:
- volumetric efficiency
- thermodynamic efficiency
- mechanical efficiency

Volumetric efficiency is the ratio between the quantity of fuel that can enter the combustion chamber and the displacement of the engine.

One of the main factors affecting volumetric efficiency is loss due to friction that the fluid encounters (air-fuel mix) when feeding from the air filter to the combustion chamber. Therefore, one of the components that greatly influences this loss is the intake manifold, since all of the mix has to travel through it with the minimum possible loss . For this reason, sudden increases in section and corners along the mix path must absolutely be avoided.
The intake manifold also acts as an accumulation tank for the fresh load , since the mix, travelling at a certain speed, requires time to stop when the reed valve closes. Therefore, mix collects in the manifold and exerts pressure against the reeds. For this reason, each manifold has a well-defined range of revolutions within which it provided maximum efficiency (tuned manifold).
In addition, the manifold supports the carburettor by connecting it to the engine casing or to the cylinder , damping vibrations between casing and carburettor and preventing emulsion of gas and air in the carburettor tank.
This apparently simple component therefore requires a great deal of study in order to take full advantage of all of its qualities.
Malossi engineers have achieved this to perfection. Malossi, with decades of experience in engine fuelling systems, has created a new line of manifolds in rubber and aluminium alloy for the new generation of scooters, and has tested and developed the line on roads and race tracks.
Malossi rubber manifolds feature a composite structure. Their construction begins with an aluminium insert that is encased in a special plastic material that is impervious to oils and fuels, guaranteeing increased rigidity at the point of attachment to the casing and greater flexibility of the manifold body.

APRILIA APRILIA MOJITO CUSTOM 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
APRILIA APRILIA SCARABEO STREET 50 2T (PIAGGIO)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
APRILIA APRILIA SPORTCITY ONE STREET 50 2T euro 2
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
APRILIA APRILIA SR (carb.) 50 2T LC 2004 (PIAGGIO)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
APRILIA APRILIA SR MOTARD 50 2T euro 2
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
APRILIA APRILIA SR R (carb.) 50 2T LC (PIAGGIO)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
DERBI DERBI ATLANTIS - BULLET 50 2T 2003->
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
DERBI DERBI GP1 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
DERBI DERBI GP1 OPEN 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
DERBI DERBI GP1 REVOLUTION 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA DNA 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA EASY MOVING 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA ICE 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA RUNNER SP 50 2T LC <-2005
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA RUNNER SP (carb.) 50 2T LC 2006-> (C451M)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA RUNNER 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA STORM 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA STALKER 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA TYPHOON 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
GILERA GILERA TYPHOON X 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
ITALJET ITALJET JET SET 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
ITALJET ITALJET TORPEDO NEW 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO DIESIS 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG EXTREME 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG EXTREME 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO FLY 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO FREE 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO LIBERTY 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG MC2 50 2T LC <-1997
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG MC2 50 2T LC 1998->
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG MC3 DT 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG MC3 DD 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NTT 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG Power DD 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO NRG Power DT 50 2T (C453M)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO QUARTZ 50 2T LC
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO SFERA RESTYLING 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO SFERA 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO TYPHOON 50 2T 2007->2010
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO TYPHOON 50 2T euro 2 2011 (C421M)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO ZIP Fast Rider 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO ZIP 50 2T 2000
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO ZIP 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO ZIP SP 50 2T LC 2001->
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
PIAGGIO PIAGGIO ZIP SP 50 2T LC <-2000
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
VESPA VESPA ET2 50 2T 2000
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
VESPA VESPA ET2 carb. 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
VESPA VESPA LX 50 2T
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic
VESPA VESPA S 50 2T euro 2 (C381M)
Not suitable for original air box filter - ATTENTION: in order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic