Apart from the multi-colourness, I think it's really neat. The design looks rather sturdy yet cool, and the scale's very accurate. The studs visible - which do stand out from the otherwise pretty sleek build - look okay to me, too.
If the green, brown and black bricks could be replaced with grey ones, it would look great.
The design does have some inaccuracies, though, like the unclawed feet and the far-streching rear, but I wouldn't count them as severe problems. After all, the latter is pretty much inevitable, since you used the motor bike as basis.
Nice job integraring the motor bike body to the structure, by the way. It's looking solid and good.