uncooperative bearings

Hi, to everyone
Don't exactly where to go for this, but hey, here I'm.
In the middle of a 43t pulley mod, the bearings that keep the belt straight,
don't split up to introduce the new ones to make them larger.
The way I see it, will have to put them back, don't really have a choice.
Got this clonker in april. Is this a new thing, with the bearings.
I hope I'm not the only one in this situation, didn't see this comming !!!
Later, dudes.

I've heard of your problem before. There are in fact 2 sets of bearings used and as you noticed 1 set splits apart and the other doesn't. But I don't recall anyone saying they had problems using the stock bearings again.