Okay, I have another question I hope someone can help me with. I have no service manual so I'm kind of in the dark here. I'm totally new to anything VW and although I got the trike running, it does not idle very good or take gas smoothly at low rpm when it's hot. It seems to be running lean because when I pump the carb a little it takes off like a house afire. It runs great at higher rpms.
Here's what I've done so far, I've checked the intake manifolds to make sure they are tight, checked the rubber gaskets, took the top off the float chamber to check for gunk or dirt (it was clean). On the right side of the carb there is what looked like an adjustment screw but when I removed it, it wasn't for adjustment, it's some sort of replaceable jet and it was clean. On the left side of the carb there is a big adjustment screw but I have no idea what it's for because it was turned out about ten rounds. It has no spring, just an o-ring. According to the papers I got with the trike it's a 2009, 1600cc, 80 hp motor. I don't know what else to check, I can't find an idle adjustment.