So this atv has two small yellow lines they seem to be vacuum line one of them is the engine side the other one is on what appears to be the transmission it is right next where the chain hooks too.


where is this line supposed to go too ?

 

Welcome to the forums.

Guessing one may be the oil injection line, one may be an atmospheric vent line. There might be 2 of the vent lines. Should also be a drain line from the carb bowl.