i ned to know what the small hole is on this side of the engine. i think im just missing a hose but the bike wont kick start with this open i believe. i can pop start it and i feel alot of air comnig out of it. please help me quick bike is a 1999 RM250
it could be a radiator hose.... but typically they hook up right next to the spark plug on the top of your head.... but im not really familiar with rm's or two strokes....sorry maybe that will help