Dellorto Item number: DEL9854
Dellorto

Special: PHDG 19 mm as a direct replacement for Vespa Smallframe SHB/SHBC 19/19 (plug-and-play depending on version) - suitable for Vespa 125 Primavera (VMA2T), 125 Primavera ET3 (VMB1T), 100 Sport (V9B1T) and Motovespa 125 Primavera (9PN/9PK/9NK/9T/9NV), among others.

Key data

Dell'orto PHDG - 19 mm Venturi version
Direct SHB/SHBC 19/19 replacement for Vespa Smallframe
Clamp connection, rigid (Ø 23 mm)
Tuning parts widely available, insert profile close to PHBG
129,00 €*
available immediately
Shipping weight 0,4 kg

Dell'orto PHDG 19 mm for Vespa Smallframe - direct replacement for SHBC 19/19

This 19 mm PHDG variant replaces the original SHB/SHBC 19/19 on Vespa smallframe models. The compact design, clearly accessible adjustment ranges and a wide range of Dell'orto parts ensure clean idle throttle, spontaneous throttle response and a basis suitable for everyday use, from near-standard engines to sporty touring configurations.

Smallframe compatible SHBC 19/19 replacement Rigid clamp connection Finely adjustable idle system

Installation and connection

Designed for smallframe intake manifolds, connection dimensions based on SHBC 19/19.
Cable routing and operating elements remain easily accessible for basic adjustment in the vehicle.
Air filter can be realized with 46 mm or 60 mm connection depending on the set.
Carburetor typeDell'orto PHDG
Mode of operation2-stroke
Ø Venturi19 mm
Ø connection width23 mm
Connection typeClamp connection, rigid
Air filter connection46 mm, 60 mm
Main nozzle100
Idle jet55
Starter nozzle60
Air nozzle Ø150
Nozzle needleW 26
Mixing tube/atomizerAN 262
Nozzle needle holder0.0 mm
Float needle valve170
Float4,0 g
Throttle slide40
2T mixer connectionnot available
Vacuum connectionnot available
ChokeDirect actuation can be retrofitted, cable holder
Adjusting screwsLeft
Accelerator pumpNo
Brand nameDell'orto

Note: Nozzle configuration depends on version and production batch. Check idling and choke function before first start.

Tuning to Vespa

Practical tips

Start with a moderately rich main jet, check spark plug pattern and speed curve under load.
Set the idling mixture screw on the warm engine so that the starting torque is spontaneous.
Gradually adjust the needle position and mixing tube to the partial load range and plan test rides.

Scope of delivery

PHDG 19 mm carburetor in the specified configuration. Depending on the variant, with required calibration elements according to the manufacturer's instructions.

Conclusion

The PHDG 19 mm is the contemporary smallframe solution as a replacement for the SHBC 19/19. Compact design, clearly accessible adjustment ranges and a wide range of Dell'orto parts facilitate clean tuning from the stock to the sporty setup.

Compatible vehicles (plug-and-play, ex works SHB/SHBC 19/19)

Vespa 125 Primavera (VMA2T)
Vespa 125 Primavera ET3 (VMB1T)
Vespa 100 Sport (V9B1T)
Motovespa 125 Primavera - 9PN / 9PK / 9NK / 9T / 9NV

Note: Vespa 125 Nuova (VMA1T) had SHB 16/16 as standard; here the PHDG 19 mm is not plug-and-play, but can only be used with a suitable intake manifold.

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