I got my stuff together and got the 250 running. It was hard to start if you could, and had no chain or sprockets as it barfed them up one day riding. I got some new ones and putem on and it was lookin good. Then I changed the oil cleaned the carb (blew the jets out with compressed air and cleaned it in carb cleanah.), and cleaned the airfilter. I emptied the tank as the gas had sat for awhile and put some new gas in it. So I kicked it over and it refused to start. It didn't sound like it was getting spark, so we sprayed some ether into the carb and it started right up. We rode it around for a while and took abreak to change the grips and bars. After we got done with that, we rode it again for a while. My nieghbor went to dinner and I was riding it home when, turning into my drive way it started backfiring and popping and died. I tried to start it again and it would not. I even tried pop starting it. I have no more ether so I sol in that department. Any idears ?