BEFORE ANY FUEL INJECTION TUNING can be performed, either by auto-tune or on a dyno with a sniffer, as has been said, the fresh air hose for the PAIR system MUST be blocked off. Accurate fuel injection tuning is impossiblee to achieve with that system in operation.
Many Vulcan 1700's have intake system vacuum leaks between the throttle body and the intake manifold. Installing the gasket from Thunder Mfg. is a very good thing to do.
"TRUE HAPPINESS IS IN THE HEART,NOT IN THE OUTSIDE FIXES!!"
WITH OVER 42 YEARS AS A MOTORCYCLE TECHNICIAN/HI-PO SHOP OWNER I AM A PURVEYOR OF FACT NOT FICTION!
"WE LIVE OUR LIVES IN CHAINS NEVER KNOWING WE HAD THE KEY"