Tacon 4074 motor upgrade

[Megabiker98]

I just got my tacon 4074 motor to replace my stock motor and an esc coming, but I am looking at the motor and the motor shaft is longer than the stock motor, and the couplet won't go down as far as it does on the stock motor, will this affect the way it mounts with the stock motor mount? I can try and think of a better way to word this and if I do think of one I will post it up
Edit: Is the SHORT motor coupler that octura makes a fix for my problem? A little more info for the post, the motor couple seems like it is gonna sit to close if not touching the stuffing tube (I think it is)