We've recently started going go karting regularly and was wondering last night why they only have numbers on the front. Its hard when you know kart 15 (for example) is the driver in front of you in the race but you dont know which kart he is. Your could be chasing karts that are lapping you for example. Any ideas why they dont have numbers on the back so you know who your chasing?

They have the numbers on the back and the sides around here. It really does not matter who you are behind, you need to pass them no matter what their number is.

Simple answer. most karts do. The organizing bodies that handle kart racing that l am familar with require numbers front & rear (if not more). And the arrive & drive facilities I've used in the last few years also generally have numbers front & back.

But, with the later, it is entirely upto the owners of the facility, & it sounds like u r doing an arrive & drive rather than running ur own karts? In that case, u will need to ask the place u r running why they do not put the numbers on the back. though most likely it is a practical reason (ie, for reasons in aiding regular service they do not keep a certain panel on the kart, which is where a number plate is designed to attach, or something similar).

Numbers are required on the back of the kart for WKA events. If the number comes off or for some reason is unreadable the kart must pit to repair it. If they do not the kart is DQ'ed.