I there i want a little help for connecting my hose on a 1986 250cc quadracer. I got a little brass connection right under the cylinder on drive side just under the carb and i really dont what i got to plug on it If someone can help me i will be appriciate. Sorry for my english
Zorl

 

i'm pretty sure what your talking about is the crankcase vent. run a hose off of it up and over the frame, watching out for the exhaust and don't kink it.