Accelerator Pump Diaphragm Spacer in Jet Kit JDK015, JDK013, and JDK002 Accelerator Pump Diaphragm Spacer in Jet Kit JDK015, JDK013, and JDK002 Pump diaphragm spacer reduces excessive pump fuel during throttle snap and acceleration Keihin PWK and FCR Instructions & Exploded Views and Parts -Picture Gallery