hate to sound like rookie at this....but I'm having a hard time starting my bike. the motor cranks, but it does no fire. and eventually when it does fire, it's only for a very brief moment then quits. Once it does fire, it runs pretty well. The past two days, I have noticed that right before it does fire, there is a puff of whitish smoke coming out of the exhaust. Then it fires right up. I had taken the tank off to check the air filter and it's okay. The fuel tank overflow/breather tube was clogged, I cleared that. I never made it to the spark plugs yet. My bike does sit outside and gets rained on. I had dumped some of the water evaporater stuff in there for the past couple of months (florida rain, every day). After the bike starts and then sits for a while (several hours to overnight) it doesn't want to start again. My bike has over 10,000 miles on it. Two Bros exhaust and PC III on it and the oil is fine. Does anyone have any thoughts?