If II baked kugel with yapchik(meat kugel) both open together do I have to wait 6 hrs if I eat just the plain kugel?
You do not have to wait 6 hours after eatig the kugel. The reason is because the kugel was only connected to the meaty yapthick through zeah (steam), and steam does not give a taste strong enough to have to wait 6 hours.
Shevet Hakehosi 1-116, Ohel Yackov pg. 249 in the name of R’ Eliyashiv zt”l and Ybchl”ch R’ Z.N. Goldberg shlit”a