Type 77B

BING Throttle body type 77B

The throttle body type 77B is a enhanced version of the very successful Type 77, which is installed in almost all BMW boxer motorcycles.

The throttle-valve variant type 77B is used in the models of the revised boxer engine generation starting in 2010, the R 1200 GS, R 1200 GS Adventure and R 1200 RT.

The nozzles have, just like their predecessors, an automatic idle and start control and a throttle position sensor and are mounted on the left side of the motorcycle.

To meet the high design and durability requirements, the throttle body, which is installed in the viewing area, gets a special black cathodic dip coating.



  • Valve diameter: 50.0 mm
  • Single pipe length: 108.0 mm
  • Motor connection diameter 52.0 mm
  • Filter connection diameter 62.4 mm
  • Minimum air flow rate 3.5 kg / h at 0.6 bar differential pressure