Join Date: Sep 2004
Location: Medford, County of Jackson, Oregon, USA
Model: None at present
Yeah, the shot air valve is to prevent backfiring and sudden deceleration when the throttle is closed rapidly. My best guess would be to check your linkage, if the pump worked before it should now, might be something missed in the re-installation much more likely than the carbs went suddenly bad.
None at present
Past 'Wings: GL1100, GL1200, GL1500, GL1800
Current BMW C650GT