lol you cant even do a U turn and you want to go on a track! Im only joking I promise.

Yes I'm sure you will need a license, at almost every track day it is a requirment unless it is one run for under 16's (the racing lads have to practice). As you can imagine you cant just let anyone out onto a track not knowing if they are even fit to be riding a motorbike let alone riding with others.
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If I have to take the carbs off once more...