Dirt Bike Wheel Bearing Replacement

Hey there! I Have a 2023 CRF110f and am replacing the wheel bearings on it. I was able to successfully sketchily get the front wheel bearings out, and I am now working on the rear. There's not enough wiggle room to move the middle spacer to hit it out with a flathead, so I'm using a blind bearing puller kit. The issue is, the gap between the bearing and the middle spacer is TINY, so when I'm using the bearing puller kit, I'm not sure what's happening, but when I yank up on the slide hammer (after tightening the expander with all the force I can) The bearing puller usually slips out of the bearing after 1-2 hard pulls, and the bearing stays in the same place. Normally I just keep putting the tool back in and if I'm lucky I'll get one good pull before it slips out which will give me a bit of clearance. However, I'm having no luck. Can I get some advice?