Hello, how are you equipping the bike, just using the E button, or by using the context menu?

Same issue, before all work awesome

Could you please send me your mod list from C:\Users\YourUsername\Zomboid\Saves\Sandbox\YourSaveFile\mods.txt
You can upload to something like pastebin and link

https://pastebin.com/mGmztpJJ
i think its beacuse Inventory Tetris, but i really dont understand why all work good and in one moment bugged, i dosent change anything :^

@TheOvVa Oh yeah it's definitely because of inventory tetris, it's unfortunately not fully compatible with my mod. I had to make some changes in my last patch which made break when used with inventory tetris.
I'm working on a lite version of the bike that should work with inventory tetris, but it won't have the attachment system.

It's because inventory tetris changes the way that transfer actions are done, and I rely on those for my bike attachments.