This is a tribute to the Bumblebee film. While the movie was actually pretty good, I can’t say that the lead was quite as solid. After losing his memory he also lost a lot of his composure and nerve which ended up hurting him quite a lot in the climax. He wasn’t even really fighting back throughout the battles which was a little iffy. While he eventually found his footing it was too late. Just as it will be here since Kurama has the massive sped advantage and will easily be able to ensnare the Autobot with his whip. Bumblebee will fall to pieces. Kurama wins.
DReager1.com 
Kurama all the way. A magic fox can handle almost anything.
PS Now try it with the canon default versions.
Definitely, Kurama’s pretty OP. By canon default, do you mean Bumblebee from say G1 and Kurama without his Yoko form? I’d still go with the latter there
Normally, I’d go with the robot of living metal for battles like this, but considering the power levels in Yu Yu Hakusho; if Kurama’s Rose Whip can wrap itself around Bumblebee’s legs or trip him, Bumblebee will tumble like London Bridge.
Yu Yu Hakusho really did get pretty high tier by the end. The power levels started rising rapidly and after a while it was pretty much DBZ level
And after this battle:
Yusuke: (off-key, and loudly to the tune of “London Bridge is falling down”)
Bumblebee has fallen down, Bumblebee has fallen down,
on the ground, and all the Autobots, Decepticons, and Aliens couldn’t put him back together again!
Hiei: (covering his ears, to make up for Yusuke’s singing)You’re mangling nursery rhymes, Urameshi!
That would definitely add to the disrespect for Bumblebee!