After changing the rear cushion, I continue to replace the carburetor ACV (Auto Cut Valve) Cover. So it will give a better fuel consumption, because no air leakage from the ACV.
ACV function is to cut of fuel pump pressure based on intake manifold vacuum pressure.
First, remove all screw that hold the carburetor. There are two screw, one on intake manifold and one on Case Assy Air/C.
Now you can see the Cover Assy clearly as the picture below.
As you can see, there is a gap on top of the cover that make the ACV didn't work properly.
Release the hose, and remove two screw with screwdriver. Then prepare the new Cover ACV.
Replace with the brand new Cover ACV and tighten it with a screwdriver. And plug the hose.
Check for any leakage from the cover.
Put everything together, and test it.
Before I replace the cover, the scooter fuel consumption only 1:32 kpl.
After it replaced, the new fuel consumption is 1:36 kpl.