OK this is a weber opened up. the solenoid valve has the idle jet on this carb. most just have a brass holder with the jet at the end pull it out to check that it's clean. the jets at the bottom are main jets. this one was set up with a 150 primary 130 secondary. air jets were 170 primary. 180 secondary. i don't know why it was set up this way but it ran OK. it was on a 20r engine. idle jet primary 45 secondary 50. to small with todays gas. my primary is a .65
