So about them cursed carbs..
As some of you might have read, I'm fixing this old shadow. After fixing the starter solenoid, the damn thing would crank by not start, thats where I found out the the choke in one of the carbs was seized up. So I drilled it, tapped it removed and replaced it. All should be well now, right? Not exactly.
The bike has a really hard time starting, you have to crank it over and over and it fires for half a second or so. After 15-20 minutes, it stays on for a pretty long time, as long as you hold the throttle partway open. If you spray some brake cleaner in the intake, it will start right up, but again, will only stay on as long as you hold the throttle partway open. I even held it and waited for the engine to reach operating temperature, as soon as I let off it died.
Here are my thoughts.
1. There might still be gunk in the carbs. I opened the diaphram/plunger side, and cleaned the needles, but I cant open the float/jet side without removing the carbs, and I have no way to resynch them.
2. The idle speed might be messed with. I doubt it, but you never know who tried to work on it earlier.
3. The bike has 2 plugs per cylinder. It is possible that only one if firing, or that they are only firing sometimes. I know they are getting power. but I have not taken them out (because I dont have a socket to fit them, and couldnt measure what size it was). New plugs are in the mail.
4. I could have been flooding the engine while trying to start it.