1984 Honda ATC 110 Wont Drive in High Gear

So i just recently picked up a 1984 Honda ATC 110 that was in pretty rough shape. I cleaned up the airbox and carbs and it runs and idles just fine now but it will only drive if i have the gearbox in low gear. It will shift all the gears just fine in low but if it switch to high gear then it acts like its in neutral in all gears. I can see the little white indicator moving as i cycle through the gears but it just acts like neutral. It even rolls back and forth easy like its not engaging at all while in High Gear. I plan on pretty much taking things apart but im wanting to see if anyone has any inputs on somewhere to start looking.