My 2001 KX 250 is having intermittent spark and acting weird at the powerband. Right before it hits the powerband, it seems to lose power and rev out. I just got it on a trade and it ran perfectly when we were trading, I guess I have bad timing. On the way to the first trail I would have ever taken it on it cut out on me and wouldn't start back. Currently we have all the electricals regarding the Sparkplug out, as the sparkplug had 1 hour on it and I put on a new one and it didn't help. Anyone heard of maybe a bad coil affecting the powerband?