Apologies for the off-topic diversion. Decided it was about time to try to remove the left side cover on the CB750 and take a look at the air filter. I am very clumsy and ham-handed and I was afraid I would break the side covers - they are very old and fragile.
The side cover was on super tight - like it was bolted on

Sprayed the tabs and grommets with WD40 and let it soak for a long time. 2 tabs were coming out easily but one was impossible to move. I read that pulling from the front is a big No-No. I tried pushing from the backside with a flat screwdriver but it would not budge. Finally decided to cut the unyielding grommet out. Replacement grommets are cheap . . . original side covers are not

I found that the only way to cut the grommet out is from the backside. I used a razor blade and cutting blind from the backside cut around the grommet surrounding the tab. Once I cut through about 1/2 of the grommet the tab slid right out. Whew!!!