Hi Patrick
In order to sync the carbs do i have to start out with the idle at 900 rpm's. I just got the bike back together and running and it dose not idle low. It wants to idle high and kind of run away. When i rebuilt the carbs cleaned everything and put new o-rings but don't know to much about the slides. when i got the idle down and started syncing i notice one carb not staying same on the gauge. I pulled that slide out and it's not very soft. So i went to my other bike and pulled one out and it was real soft. I might be barking up the wrong tree but i don't know this is my first time going this deep on the valk. When i bought the bike it was locked up and a lot of it was in bags and boxes. So don't know where to go from here any help is great.
Thanks Dennis
If someone had adjusted the carbs while it was having problems, the setting could be way off and require resetting.
I would check that everything is set to standard.
I have not seen a diaphram get hard, most failures are holes or splits. If it is not a supple as the others in the same bike, I would replace it and check the others. Sounds like it was exposed to a drying agent.
A high, runaway idle can be a sign of a vacuum leak and a lean condition so check that . A heat gun can check the temperature of the header pipes to help identify which ones.