sorry idk if this is already a thread on this forum, but dumb me didnt check the gas tank before i rode my SSR 125cc pit bike today, and i ran out of gas. i didnt put it on RES cause i didnt know at the time what RES was, so i turned the fuel off, and i walked my bike home, filled the tank with about a half a gallon, and tried starting it with the fuel on ON and RES, and it wont start, i checked the spark plug, and it looks fine. is it a fuel line or what? and how would i check? sorry im new with dirt bikes, been a fan all my life, and recently am able to afford one, but im trying to learn. any help would be appreciated.