DELL ORTO PHM BS1 Carburetor Ø38mm – Manufacturer ref. 4813
Originally designed for the BMW R90S, this Dell'Orto PHM BS1 Ø38 mm is aimed at riders looking for a reliable carburetor for restoration, replacement, or installation on compatible 4-stroke engines. Compact and robust, it features an accelerator pump for a more responsive throttle and a calibrated slide for controlled fueling.
Essential technical points:
- Venturi diameter: Ø38 mm.
- 4-stroke carburetor with accelerator pump.
- Airbox side thread: M52 x 1.25 (allows for the installation of threaded horns/venturis).
- Clamping by collar, suitable for manifolds from 45 to 48 mm.
- Choke mechanism designed for cable (a lever version can also be installed).
- Vacuum connection for carburetor balancing.
Jet set and carburetion elements included:
- Slide: 605
- Needle jet: K4
- Atomizer: 260
- Main jet: 155
- Idle jet: 60
- Accelerator pump jet: 38
- Choke jet: 60
- Float needle: 300
- Float: 7450.1 – 8.5 g
A carburetor designed for mechanical enthusiasts who want to maintain an original setup or adapt classic equipment to their machine. Check compatibility and settings before installation.
