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- Vespa Classic
- Cylinder -ITALKAST GR-V 135 ccm Ø58mm, stroke=51mm, cast iron, direct intake, standard reed valve- Vespa PV125, ET3
Sporty smallframe cylinder kit with direct intake on the cylinder, classic 4-valve diaphragm and PV/ET3-specific intake manifold.
The ITALKAST GR-V 135 for Vespa PV125 and ET3 is the cheaper version of the sporty direct intake concept from ITALKAST. In contrast to the more complex version with an 8-valve diaphragm, this kit works with a classic 4-valve diaphragm. This makes it somewhat simpler in terms of design and more attractive in terms of price, without changing the basic concept: Cast iron cylinder, direct intake on the cylinder and a clearly sporty design for performance-oriented smallframe engines.
The big difference to classic smallframe cylinders is the direct intake. The mixture is not controlled via the original housing inlet, but is fed directly via the diaphragm and cylinder. As a result, the original housing intake system is shut down or closed and the setup can be set up more freely via the carburetor, exhaust and crankshaft.
This version uses a standard 4-flap diaphragm with GRP plates. This is structurally simpler than the double 8-petal construction, but is still a very sensible basis for many sporty smallframe engines.
With 123° overflow timing and 184° exhaust timing, this version also has a clear sporty positioning. The kit is not intended as a close-to-production replacement cylinder, but as the basis for a lively, high-revving smallframe engine with diaphragm control. The 4-valve version is aimed more at a more affordable, yet sporty overall package.
The main difference between the PV/ET3 version and the PK version is the different design of the intake manifold. Anyone mixing parts should therefore pay close attention to the respective vehicle platform. The common basis for both versions is the less expensive 4-flap diaphragm.
| Manufacturer: ITALKAST | ITALKAST |
|---|---|
| Type | GR-V 135 ccm |
| Type of construction | Cast iron, direct inlet on cylinder |
| Bore / stroke | 58 mm / 51 mm |
| Displacement | 132.37 cc |
| Diaphragm | 4-flap with GRP plates |
| Intake manifold | PV/ET3-specific design |
The ITALKAST GR-V 135 for PV125 and ET3 is an interesting choice for all those who are looking for a sporty direct intake kit but deliberately do not want to go for the more expensive 8-valve version. The 4-valve diaphragm makes the kit less expensive, while the sporty basic concept with cast iron cylinder and cylinder inlet remains completely intact.
