I don't know. Could be anything, really. Did you update the game files mid-game?
I tried to reproduce the issue in a new game, but the bike works fine. No visible trunk following me around. So whatever caused this for you broke some condition checks.
/Edit: if you upload your savegame somewhere I could try checking it out and maybe fixing the issue.
I tried to reproduce the issue in a new game, but the bike works fine. No visible trunk following me around. So whatever caused this for you broke some condition checks.
/Edit: if you upload your savegame somewhere I could try checking it out and maybe fixing the issue.