I think that's a good attitude -- to a point. Wait until the right moment, okay, but don't give up your own dreams completely.
I think you should go ahead and tell your founders about your aspirations. They may very well be supportive; I've definitely read that many YC founders encourage their employees to do their own startups. Telling them will give you and them a chance to work out a plan for what you should get done before you start applying to YC or other accelerators in earnest.
And if they're not supportive, well, maybe they weren't so deserving of your consideration as you thought. I find this hard to imagine, though. It's not like you're quitting outright.
I think you should go ahead and tell your founders about your aspirations. They may very well be supportive; I've definitely read that many YC founders encourage their employees to do their own startups. Telling them will give you and them a chance to work out a plan for what you should get done before you start applying to YC or other accelerators in earnest.
And if they're not supportive, well, maybe they weren't so deserving of your consideration as you thought. I find this hard to imagine, though. It's not like you're quitting outright.