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[Deskripsi]
INTAKE MANIFOLDS
The intake manifold conveys the air-fuel mixture to the engine by means of a 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, traveling 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 provides 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 aluminum 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 aluminum 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.
ATTENTION: In order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic.
| CODE | Material | Ø hole | Ø manifolds | Ø inlet | total length | Carburettors Applications | Note |
| :-------- | :------- | :----- | :---------- | :------ | :----------- | :----------------------------------------- | :--------------------------------- |
| 02 8857B | NBR | 6.7 | 22 | 28 | 29 | PHBG 15-21 Racing (linkage 28), PHVB 22, PHBL 22-25 | Not suitable for original air box filter |
| 0213222B | NBR | 6.7 | 22 | 24.5 | 29 | PHBG 15-21 Racing | Not suitable for original air box filter |
| 0213661B | Viton | 6.7 | 22 | 24.5 | 29 | PHBG 15-21 Racing | Not suitable for original air box filter |
| 0213662B | Viton | 6.7 | 22 | 28 | 29 | PHBG 15-21 Racing (linkage 28), PHVB 22, PHBL 22-25 | Not suitable for original air box filter |
---
*Products reserved exclusively for racing in specifically designed locations according to the provisions of the competent sporting authorities. We disclaim all liability for improper use.*
INTAKE MANIFOLDS
The intake manifold conveys the air-fuel mixture to the engine by means of a 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, traveling 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 provides 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 aluminum 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 aluminum 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.
ATTENTION: In order to use the MHR manifolds it is necessary to perform some small modifications to the adjacent plastic.
| CODE | Material | Ø hole | Ø manifolds | Ø inlet | total length | Carburettors Applications | Note |
| :-------- | :------- | :----- | :---------- | :------ | :----------- | :----------------------------------------- | :--------------------------------- |
| 02 8857B | NBR | 6.7 | 22 | 28 | 29 | PHBG 15-21 Racing (linkage 28), PHVB 22, PHBL 22-25 | Not suitable for original air box filter |
| 0213222B | NBR | 6.7 | 22 | 24.5 | 29 | PHBG 15-21 Racing | Not suitable for original air box filter |
| 0213661B | Viton | 6.7 | 22 | 24.5 | 29 | PHBG 15-21 Racing | Not suitable for original air box filter |
| 0213662B | Viton | 6.7 | 22 | 28 | 29 | PHBG 15-21 Racing (linkage 28), PHVB 22, PHBL 22-25 | Not suitable for original air box filter |
---
*Products reserved exclusively for racing in specifically designed locations according to the provisions of the competent sporting authorities. We disclaim all liability for improper use.*
Peringatan
Compatible brands and models
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 SCARABEO CLASSIC 50 2T euro 4 2018-> (CA91M) *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 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 SCARABEO STREET 50 2T euro 4 2018-> (CA91M) *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 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 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 SR R 50 2T LC euro 4 2018-> (PIAGGIO CA81M) *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 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 SR MOTARD 50 2T euro 4 2018-> (CA41M) *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 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 APRILIA SR Street 50 2T LC 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 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 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 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 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 DERBI VARIANT Sport 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 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 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 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 RUNNER SP 50 2T LC (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 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 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 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 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 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 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 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 NRG Power 50 2T LC euro 4 2018->2020 (CA71M) *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 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 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 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 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 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 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 NRG MC2 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 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 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 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 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 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 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 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 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 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 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 TYPHOON 50 2T euro 2 2011->2017 (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 TYPHOON 50 2T euro 4 2018-> (CA41M) *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 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 ZIP 50 2T 2000-> (C25EM) *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 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 ZIP SP 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 VESPA ET2 50 2T
Compatible brands and models
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 SCARABEO CLASSIC 50 2T euro 4 2018-> (CA91M) *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 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 SCARABEO STREET 50 2T euro 4 2018-> (CA91M) *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 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 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 SR R 50 2T LC euro 4 2018-> (PIAGGIO CA81M) *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 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 SR MOTARD 50 2T euro 4 2018-> (CA41M) *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 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 APRILIA SR Street 50 2T LC 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 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 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 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 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 DERBI VARIANT Sport 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 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 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 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 RUNNER SP 50 2T LC (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 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 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 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 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 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 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 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 NRG Power 50 2T LC euro 4 2018->2020 (CA71M) *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 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 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 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 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 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 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 NRG MC2 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 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 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 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 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 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 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 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 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 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 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 TYPHOON 50 2T euro 2 2011->2017 (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 TYPHOON 50 2T euro 4 2018-> (CA41M) *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 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 ZIP 50 2T 2000-> (C25EM) *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 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 ZIP SP 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 VESPA ET2 50 2T
