Any tool that you use to work on your mower at home, be sure you have one along with you at the track. if you have a generator or access to power bring power tools too. Be sure not to forget an air tank for changing air pressure at the track.
I probably carry too much stuff, but what you don't have always seems to be what breaks. I don't think this is a complete list of what I bring. In theory, you should have a spare of everything on your mower. That's if you want to be sure you can fix whatever breaks on the track.
The starred items, you'd be crazy not to have.
At least one extra of every bearing on your mower.
An extra of every pulley you use.
*Belts
*Spare roller chain cut to the right size, if you use it. Along with connector/half links.
Chain sprockets.
*Wheels/tires
Wheel hubs.
Tie rods/ends
Steering wheel
Throttle cable
Brake fluid/brake lines
Starting fluid
*Jumper cables/jump box
An assortment of bolts/nuts
Any small pieces that you use: clips, washers, throttle pieces etc. etc.
If you do your own engine work, bring spare top end parts. I.e. Rocker arms, pushrods, flywheel key, anything you can get to without splitting the engine. A spare motor is best, but I don't carry one. I wouldn't have enough time to change one if mine blew.
