it didn't start at all after i had filled it up. sprayed some ether in it, changed the plugs, didn't even fire once. that was last week thursday, i just had it out today (tuesday) and it started on the second pull. it ran for a little while, wouldn't go over 6K rpm, and then died after about 5 minutes. we figured one of the plugs was dead, even though neither had gone more than 1/4 mile....anyways, switched plugs, started right up, full power, rode it for 30 minutes with no problems, everything seems fine, but im sure its not yet.