Hey I'm a new rider and don't know much. I purchased a 2000 kx 125, after riding about a dozen times it bogged out and died. Won't start back up, tried pulling in clutch and releasing while being pulled (in 2nd gear) just bogs out and won't start. I've changed the spark plug, previous one had no gap and was flat. I've always mixed the gas correct I have a ratio rite cup, 32:1 mixture. Any suggestions?