Problems starting

[Jonathan_alicia]

So my gz250 wouldn't go past 40 miles an hour. I replaced the spark plug and it seemed to do the trick. After about a day of riding the spark plug blew out and i was left stranded on the side of the road. I got it towed home. I replaced the spark plug again and replaced the battery. Now it clicks but won't start. Any ideas?

[Jonathan_alicia]

So, I replaced the battery and the spark plug. I also tried removing the spark plug again. Pulling out the air filter and draining the airbox. It had a little bit of oil but ot still wont start. I've also tried to push start it and the solenoid trick. Nothing. I really don't want to take apart the carb. I'd rather leave that to a pro. Is there any suggestions on what the problem could be? Im gonna try to replace the starter soon but the starter was working fine before so im not 100% that's the problem

[5th_bike]

If it has been sitting for a while, it's most likely that the carburetor is clogged. I never took it apart, but it's doable and there are several good posts and also videos about it I think. Otherwise, I'd take it to a shop.

[alantf]

What exactly do you mean by "the spark plug blew out". Do you mean that it shot out of the engine? If so, seems like the threads in the head have gone, so the new plug is not making a seal.