Some good advice, here. As for the stock petcock, if it's not leaking, you can run on "PRI" just fine, just be sure to change back to "RUN" when it's not running. If it is leaking, replace it. Or, like most of us owners, just replace it and save the headache. One of the first changes I made on my 2012 was to add Progressive (TM) shocks, designed for the Suzuki Intruder, S50 I think. Big help. The Stocks didn't give at all under my 170# self. Like riding a hard tail - miserable. I also adjusted the air mix screw, and add a commercial fuel stabilizer at every fill up - really cuts down the after firing.