I just got a peugeot 103 SP-U3 for cheap. I got it running pretty quick with some filing of the points, but it still has issues.
It has a dellorto SHA 16.16 on it, with a 72 jet, and a wire mesh air filter thingy.
First off, it idles a little rough. It’s lopey and erratic, and dies randomly sometimes. Also if I twist the throttle, it starts cutting out. If it doesn’t die, it eventually picks up and revs all the way out, running really good in the top range.
If I pull the choke about half way, it starts idling really well, and gives smooth power immediately when i twist the throttle. But then it starts 4-stroking before it can rev up high.
I’m guessing this means that idle is too lean? But there’s not any adjustment on the SHA carbs for the idle mix. Has anyone else had any problems like this?