Hello, i have a 78 enticer 250 that i just changed over the carb to a 34mm mikuni. i used the jetting that i found when i searched the info on the carb. Now it started right up and idles fine but as soon as you touch the throttle it cuts out and you can see gas comng out the vent tube. I got this sled a year ago in a group that i bought and have never ran it. Do you think i need to go after the carb yet or maybe a electrical problem? It does have 130 lbs of comp. Thanks Rich.