I haven't struck a dud Tamyia 1/12 motorcycle yet but the instructions for this one, if not carefully read, could lead you astray. Perspective changes from 1 assembly instruction to the next and the scale of the pictures is not large. You can get things on backwards on the engine if you are not careful. Once you're over this it becomes quite a good kit, although this is the only one of the series that I've needed to use putty on.