Visually I'd agree that the stem is the most wrong thing - much of the rest really shouldn't be there, but somehow all together it works. one of those red Kore ones? or a Roox, but preferably quite flat, especially with that big fork.
Oh and not keen on that saddle - red or blue flite or something? or white...
Good it's being used, and at least it's NOT got green tyres
Quite like the red/blue panaracer idea, or Red Michelin Hots.
chain does want shortening though....
And if it was mine I'd twist the bars up a bit and drop those brake levers down.
Nice bike - if all the abuse gets too much you could always give it to me...