Air intake hose adapter -MRP Dumbo Ø60mm (Keihin PWK 33-38mm, Mikuni TMX 35, Polini 32/34, Dellorto PHBH 28/30, VHSH 30)- Vespa PX, T5, Sprint, Rally, GT, GTR, GL150, Super, VNA, VNB, VBA, VBB 

 Clever solution from MRP to continue to draw cool air from the frame when using larger carburetors.

The opening in the frame is about 60x44mm. The area is therefore equivalent to a carburetor with a cross section of over Ø50mm. Thus the intake hose solution offers no loss of performance even on very powerful engines. Due to the cooler intake air, better performance results can be expected under heavy load, which strongly heats up the air under the side cover that would otherwise be sucked in.

Another big advantage is that the frame can also be used as sound insulation. Engines that have been converted to intake control via diaphragm can thus drastically minimize the noise level of the intake air. For this purpose, the frame can be additionally lined from the inside with sound-absorbing material.

TIP: It is essential to retain/install the standard plastic molded part installed underneath the tank. Otherwise the intake noise from the area of the horn (frame tunnel opening) is quite loud. In the intake cutout under the front seat bench mounting, a pipe can be additionally inserted into the frame. This refracts the sound again and suppresses the medium to low frequency range of the intake noise.

This version with 60mm outer diameter is suitable for the following carburetors:

• Keihin PWK 33, 35 and 38
• Mikuni TMX 35
• Polini 32 and 34
• Dell'Orto PHBH 28 and 30
• Dell'Orto VHSH 30

Scope of delivery:

• Suction hose adapter with 60mm outer diameter, black powder coated
• Mounting plate inside and outside made of aluminum
• Sealing rubber for the frame flange
• Very flexible suction hose with wire spiral, 60mm inside.
• All screws required for mounting.