Air breather hose, fuel
1995 Vulcan 88 (1500a1).
Basket case, I’ve been unable to start the bike since last ride. She stalled out on me when I pulled the clutch in my driveway.
I have since replaced float valve needles. All rubber seals, most of the hoses. Full petcock rebuild. New battery. New spark plugs. New fuel filter. New fuel (after attempting to run both sea foam and gumout, separately of course).
When I blow starter fluid through the air box she will start, aggressively; as if open full throttle immediately. But only for a quick second then dies.
All plugs getting spark. It is sucking air.
It sounded like a fuel delivery issue to me.
Tore down and cleaned carbs, again! Double...triple checked float height. It meets specs both apart and on bike measuring per manual.
Now, while trying to start it it runs fuel out of the “carb air breather hose” (as labeled in the manual).
When I block the end of this hose with my thumb I can get the motor to “chug” but not start or run. And fuel still drains when later uncovered following attempt to start.
I cannot find in the manual where this hose should connect (if at all. It appears to drain right out the bottom). And why am I getting fuel out of it?
The hose is #5, and #6 is the connector in the enclosed pictures.