Our Barracuda Bike Parts™ air cutoff valve kit for the 1975 to 1979 GL1000 that has the parts necessary for a complete rebuild i.e. diaphragm, spring and O-ring. Replacing your air cutoff valve will improve starting, warm up, idling and acceleration. To further insure against any additional vacuum loss, replace your inexpensive carburetor manifold o-rings. Note: The GL1000 requires only one (1) air cutoff valve.

GL1000 Air Cutoff Valve - $16 set

How to Improve Your Motorcycle's Start and Warm Up, Idling and Acceleration