Can u solve this?

Definite misfire. Does not sound fuel related. Check for bad plugs or wires. Ignition module and crank sensor.

Sounds to me like an inspection of the fuel lines and fuel tank need to be done. It could need replacement fuel lines depending on how many miles you have on the vehicle

No that would not be it. Are you using the correct grade of a good quality name brand fuel?

When Harley's spit through the carburetors they usually pull off the intake manifolds and reseal the them . New gaskets, o-rings, or even manifolds, whatever it takes to seal the intake. You may want to run some Yamaha Ring Free Fuel Additive ( Chevron Techron Fuel Additive) through the bike. A bad spark plug or spark plug cap could also be contributing to the pre-ignition that you are experiencing. If you can fix it yourself may be Yamaha will be kind enough to cover the parts cost if you are still under warranty and you are very polite in the letter you write.

possible fuel pressure regulator leaking high pressure fuel into attached vacuum hose

NEED TO CHECK GAS LINE FOR LEAKS

IF YOU GOT CYLINDER MISFIRE.OR OPEN FUEL INJECTOR.THAT WILL CAUSE THE PCM TO ENRICHEN FUEL MIXTURE.TO ADJUST TO DEAD CYLINDER.WHICH ACT AS A LARGE VACUUM LEAK.THATS WHY YOUR EXHAUST TAIL PIPES HAS A RAW FUEL SMELL AND WHITE SMOKES.

SOUND LIKE A RUPTURE FUEL PRESSURE REGULATOR.OR LOOK FOR LEAKING FUEL RAIL TO INJECTORS.AND A LEAKING FUEL LINE.

I have 08 1100 vstar, haven"t road in a month or so, but have regulary started to keep baterry charged. i took it out yesterday to ride, hard to start, acted like it running on one cyl. strong smell of unburned fuel from exhaust. ????????