To my knowledge, the crankcase gasket is the toughest, if not the most impossible gasket to find for these bikes of ours.
You're in luck for unasked information
I purchased every single gasket listing that exists. This wasn't intentional, it just happened. Especially considering they're always paired with something (seals, x2 - M14 clutch nuts, clutch parts for some reason?) now, the brown ones you see in listings are NO GOOD and aren't even good to make templates out of. I'm all about busting out some Fel-Pro and going to town, but forget it. They get shipped to you in a zip lock bag and will always come frayed, bent or ripped.
Now, there are a few options for "good gaskets" but this only pertains to 47mm, 48mm and 49mm bore engines.
I have purchased all of these and can speak on how they're shipped.
"ntnmotorcycle" (listing #1) is another subsidiary of CDH just like DONSP1986 is. Those were shipped packaged in cardboard which was great. The BBR ones were shipped in a literal cardboard box. They could of easily of been thrown in an envelope.
The white gaskets are the perfect gaskets both in material (reminds me of fel-pro 3157) and thickness. The brown flimsy ones are too thin, aside from eventually blowing sooner than later, with it being so thin; what will happen is the center of the clutch basket (flower nut and 3 pins) will rub on the clutch cover because each case halve was brought in closer due to such a thin gasket. The stock gasket and these gaskets share alot of similarities in both material and thickness (roughly 1mm)
CDH Gaskets (Photo #1)
BBR Crank Case Gaskets (Photo #2)
In conclusion, find a listing that has the white gaskets in it.
Now, I will resume normal conversation
@DAMIEN1307 I was shocked that there weren't any YD100 crank case gaskets. I assumed there must be ones for the P85 as that is on a YD bottom end, and nope, not there either. What about LD100? Nope, not there either.