KDXRIDER.NET

[url]So I put back my cases together and whenever I try shifting. Well it’s a little odd, when I shift up or down it gets super stiff or locked up, and it’s a little difficult to get it unstuck and go into another gear . I could shift all the way up to 6th and then whenever I try shifting down it gets stiff/locked, or sometimes I can’t even get past 3rd gear without getting the same issue, it’s all random whenever it wants to do this i believe .

I can’t post videos here so I’ll link a Reddit post with some videos
https://www.reddit.com/r/Dirtbikes/s/9dHQLUYBX2

The engine needs opened up no matter what, bottom line. That may just mean the clutch case housing needs removed, and perhaps you could determine what's worn or incorrectly installed, but there's a chance the cases need split as well.

This is a difficult thing to diagnose over the forum, as it needs a deeper in-person inspection (opened up).

Absolutely sounds like a reassembly issue. There are a few thrust washers and spacers that are critical to the shift mechanism working correctly. I assume you inspected the shift forks, all the gears and their associated dogs, shift drum...
As Chuck said, going to have to split it to fix it.