My RST won't start if left unused for about 5 days. A few hours after trying, it kicks off then. Now recently I put an Optima racing battery and I could afford a few more starting tries. I noticed that if I turn the ignition on, press the throttle all the way down and try to start it it will kick off after a few seconds though not immediately. Before it actually turns on, it feels like it wants to start but something's holding it.

Sounds like flooding? What do you think?