Actually, there is a starting routine.
1) Turn on the gas
2) Pull the choke out
3) Press the MAGIC button on the handlebars
4) Push in the choke after it warms up
5) Mount the bike and have fun.
Ebay will be your best bet. I lost one on a ride one time before the magic button bikes. It sucked because I was at Little Sahara on my YZ490. Caleb's will fit, invite him for a ride and when he's not looking borrow his.