Whats up guys. My 2011 450 is acting up. This weekend it got hard to start cold. Exhaust valves were a little tight, adjusted them but im still having an issue. It will start for 1-2 seconds then die. I go through this a few times and when I give it gas right when it starts to fire up it will finally run, but usually only when I give it gas to help get it started. I checked codes and got nothing. tps is in spec. Cleaned my fuel filter today, going to clean the injector tomorrow. I have about 18 hours on the spark plug and piston. Any insight? I was thinking of buying a new plug also.