I have seen and heard of many very different minimoto's (E.G. like the GRC and the GP3 and the chinese bikes!!)

GRC's(RR)

CHINESE BIKES

POLINI GP3

POLINI 910 CARENA S

BLATA ORIGAMI

BLATA ELITE

PASINI

ZPF

As you can tell from above, there are many, many different types of minimoto !