What are the rules/procedures for having 2 bikes at the track, as in, 1 main bike and a backup? Does the backup need to have the same number on it? If it is a different size, what do you do for tech? Is this something that has to be done right before you decide to use the 2nd bike or can you pre approve it when you go through tech in the morning? I have been offered a 750 to use if I want to. Sweet! Later, Kevin