hi, I bought my kfx450r in december and I ride it a few times (30 km in all) then I went for my first real ride and after 30 km I stopped because I had no power and my engine starting to be hot... top speed 35mi/hr !!!! I let my atv in the barn is it possible my fuel froze and give me that problem... (I live in montreal, quebec so it's very cold outside during the winter!!!)

It was minus 10 degrees celcius, oil and coolant were perfect
 
spark plug was kindly blue but cannot change at this time...reason: new type of spark plug and nobody had it !!!