hello everyone! I just finished my engine on my bike and it was great to hear it come on. I dont know mjuch about engines but I plan to learn. My question, my engine turns off when I let the throttle spring back to orignial position, so shouldn't the engine stay on when I let the throttle go? or do i have to keep on giving it gas with the throttle to keep it on? Do I have to adjust the carburator some how? and what is the screw on the side for? thank you everyone!

