A Motocross race number refers to the number of applicants racing. The letters are away separating drivers from each other.
I assume by the word "was" you mean when was the first motocross race or when was motocross racing started. It started in Europe in the early 1920's, for the U.S. it come into prominence in the early 1960's.
What do you mean? If you are meaning that is a race than it can a maximum of 30 riders depending on the race. if this isn't what you mean please reword your answer. Thanks.
What do you mean? I can probably answer any question involving Motocross (Motorbike racing) but do you mean how do you participate? Well, the way I race, is I go to big national races, where a bunch of other people race too, against me, but only in my class, (bikes around my size and people my age) and we race dirt bikes, basically some people only race for the fun of it, but some people only race for the prizes. If this wasn't your question or not a good answer, I'm sorry.
TE
It means your an IDIOT !
if u mean a motocross bike a 500
By dirt bike do you mean and enduro bike or a motocross bike or some other bike at all? For any bike except motocross bike you definitely need license, and for motocross bike you don't, because you can't ride it on the streets at all... You can only use it in motocross tracks and for that you need to have a special permit...
Letter I is number 1
i believe that trailing is when you ride anywhere or pick your own route the the finish, enduro is a massive track which can take up to 5 minutes to complete and you are timed, motocross is just a straight forward race between riders
Usually the letter n stands for number, and it means some unspecified number.
LETTER- type of fire it will extinguish NUMBER- capacity. Higher the number, the bigger the fire it can extinguish.
An unknown number