Thanks everyone's
2004 vtx 1300 30 k miles I'm of the opinion it's petcock diaphragm. I've ordered the diaphragm and a complete new petcock took it to clawsons.Dev 14 got it back Feb. 3rd grrr. Somehow problem went away now its back they (clawson ) couldn't find problem so I'll replace all vacuum lines and petcock valve.