The tyres looks a little thin compared to most motorcycles, no idea if that's intentional or not, just makes it look a little more like a bicycle than a motorbike.
If it were to be functional wouldn't the strip around the rearwheel be at risk of being damaged being placed like that? I'd imagine it would be better of on the inside of the wheel where it's connected to the chassis.
And if I'm to nitpick (Again) shouldn't the first three pairs of exhausts be facing the other way to cut down on air resistance and in order to actually work? Looks like any exhaust would have trouble getting out of them when air's blowing into them. (Which would probably cause the bike to have a few problems if it were to be functional.)
That's all I can think of concerning the construction of it, but I think I'll also suggest using one or two colours, as generally speaking anything more than three colours loses some measure of its asthetic pleasantry.
... I think that made sense. My bad if it didn't.
's nice though.