R4813 PHM 38BS1

Original equipment on BMW R90S, but can be re-jetted to suit any engine.

4 stroke carburettor with accelerator pump. M52 x 1.25 Threaded air intake connection.

Clamp type engine connection to suit 45 - 48mm diameter stub. Cable type choke mechanism fitted, lever choke can be fitted if requested. Vacuum takoff for balancing.

Standard Jetting

• 605 Slide
• K4 Needle 
• 260AB Atomiser
• 155 Main jet
• 60 Idle jet
• 38 Pump jet
• 60 Choke jet
• 300 Float valve
• 7450.1 Floats - 8.5 grams