My son in laws bike is very easy to kick over (auto decompression working properly?) My bike is much harder to kick over most of the time, but at times it's very easy like our other bike. Not sure if the very easy or the harder to kick over is normal. I like to slowly kick the motor until I feel a resistance, then get the kick starter to the top and kick a smooth full kick. It has a decent amount of resistance when I kick it. Starts first kick most of the time. Gray please expalin why the difference.