Okay, so I tried fitting my size C SPEC bearing into my DM but it wouldn’t fit. It says in the YYF bearing page that the size C bearing would fit most YYJ yoyos. It took me about 10 mins to get it out again with tissue paper and those grippy thingies. So im just wondering if a size C KK bearing will fit a DM or a 888x.
P.S. Can a DM have spacers because I need my DM to be a wide gap.
Thank you
The Spec bearing does fit in your DM, the bearing seat is just tight so taking it out is difficult. Most YYJs are like that. If it says size C, it’ll fit. And yes, you can put spacers in there. Gray and red YYJ shims used to be the thing back in the day.
Back in the day. Haha.
The DM has an adjustable gap so you can make it wide enough by opening it up some.
Just make sure you don’t unscrew it too much. 
What spacers can you put in the DM??
Either YoyoJam red or grey shims. The red ones are thicker.