Joee
XS650 Member
So I have a 1976 xs500 and I am having too much trouble with the carbs. The exhaust right now is 2 manifolds down to one exhaust pipe which isn’t stock for that bike. Also I have air pod filters not the original air box the stock bike has. So right now the bike only runs with the choke on and that’s only at 3,000 RPM idle.
I have bought new pilot jet sizes because I felt like that need to be changed with the exhaust being more restrictive. Stock pilot jet is 30 and I tried 32.5 and nothing changed. Should I go bigger or smaller with the pilot jet and I also am having the hardest time trying to get the AF screw to the proper setting. Not sure if the two screws are different as far as setting goes on the BS38s I have. I am getting to the point where I may take it to the shop cause I have no where to turn.
Any idea how many turns I need on the AF screws and which pilot jet size I should use and whatnot.
Keep in mind the carbs are all clean and im pretty sure there is no vacuum leak. The bike simply starts only with the choke on then after 2 minutes or so I will turn the choke off and the bike will stay running for only another 2-4 minutes then will die unless the idle speed screw is high enough where it can idle at 2,500 ish. Anything lower than that without the choke on it’s not running.
I have bought new pilot jet sizes because I felt like that need to be changed with the exhaust being more restrictive. Stock pilot jet is 30 and I tried 32.5 and nothing changed. Should I go bigger or smaller with the pilot jet and I also am having the hardest time trying to get the AF screw to the proper setting. Not sure if the two screws are different as far as setting goes on the BS38s I have. I am getting to the point where I may take it to the shop cause I have no where to turn.
Any idea how many turns I need on the AF screws and which pilot jet size I should use and whatnot.
Keep in mind the carbs are all clean and im pretty sure there is no vacuum leak. The bike simply starts only with the choke on then after 2 minutes or so I will turn the choke off and the bike will stay running for only another 2-4 minutes then will die unless the idle speed screw is high enough where it can idle at 2,500 ish. Anything lower than that without the choke on it’s not running.