How to save more money as a teen, for a car and motorcycle?

I'm about to turn 16, and would like to save up for a reliable, cheap (2k-4.5k), good-looking, car. It has to be American, or anything other than Honda, Subaru, Toyota, Lexus, Hyundai, etc. cause dad works for GM. I am paying for the car on my own, most likely, but maybe I can convince parents to pay 1k or so. Money is tight right now in my family. Dad got demoted last year during GM's bankruptcy, and may get a promotion in spring. My Mom is opening a restaurant this year, which is going to cost a lot. I got a job in November at a brand new Kroger grocery store, where I get minimum wage and cannot work over 16 hours per week because I'm only 15. I have saved a little over 1.2k in the bank. I also have invested $500 of my own money this year into stocks, which are up a little. This might sound dumb to some, but I have dreamed of buying a motorcycle. I want a Kawasaki Ninja 650R. AND YES, I KNOW INSURANCE COSTS MONEY, (FOR CAR AND MOTORCYCLE) I'M NOT AN IDIOT. I also need to plan on how to save for that. Any tips, help, and info would be great! Thanks so much.