Here are a few points to notice about clutch bang or leading up to:
1. The big clutch basket constantly runs with the engine. When you pull the clutch lever in, the other basket may still spin with the big or; clutch-outer basket.
2. The clutch center basket; usually holds the steel plates. However, steels warp faster than the friction plates. Also, when we pull the clutch lever in, there is not a lot of gap between plates. The steel, if warp, will kiss the spinning outer basket. If there was no spin to the clutch center, it means, the clutches are fine.
3. Right now, you should understand that one basket moves, the other does not. Or else, you could never stop the back wheel. With that said, we come down to the 3rd issue:
a. We know if it is hard to find N from a dead stop, we have a clutch issue. This is the steel tagging the friction. This is where the center clutch basket continues to spin with the outer basket. Previously stated in another post, the bike might creep, the steels are that warped. One down.
b. However, being the clutch center can stop in theory, the plates rattle, bang onto each other [once again] thus; continues to keep the center basket to keep spinning some. We know that if N is found with ease, there is no need to adjust the clutch. The slack at the cable is the minor adjustment. Once that screw is initially set, you ride that gap in with the cable taking up the slack going in. This shows you that wear [down] factor at the threads of the cable. Time for a new clutch pack, if you are looking at a used bike and want to know its condition? Tell no one about that trick, bringing your price down.
c. The initial question was, "sometimes." The answer is; This is normal. Sometimes you keep the lever in long enough, the center basket stops or slows enough to eliminate the bang in. Sometimes, you need to catch yourself as to when, and how you make that noise disappear sometimes?
Personally, I am in 1st before I start the bike. Home he here does not have shebang-shebang, ever. If you can figure it out, I've stopped that move long ago. My videos point that out that subtle move; a lot! I've even torched a brand new steel plate. Measured it on a surface plate afterwards. I also show me dunking the plate in water. The video shows again; that new plate did not wrinkle on bit. And that poor thing was in a drawer, all pushed around with other parts in that same drawer. So, yes, there is a tiny, can push the feeler under it. That was how the brand new plate began the test, or this is the base starting out point of the experiment.
What this showed me was; the next experiment to keep the clutch pulled in. This kept the bike from slamming it into 1st gear at every stop. I wanted to prove some fallacy about keeping the lever in. Someone says it will burn the plates. The theory being; Heat transfer would suffer from plate to plate. It would isolate that one plate. Thus, the cooking of the steel plates. Well, to this day, I can snick 1st into N without gimping to the hospital with a torn left ankle she-sheered inside me. I she-banged too much toe jam out from under me big toe too, Doc.