Hi new to this but here goes when i start my 2005 700 sportsman efi and get on the machine shuts off

 

Welcome to the forums.. I hope you find an answer.. thats a perplexing issue. do you have anymore details? are you bumpin the kill switch?

 

Nope not hitting the switch, I start the machine grab the handlebars step on the footboard and it shuts off.

 

Sounds like you might need to adjust the throttle cable. Maybe when you get on you move the bars just a little and the safety shut off turns the bike off. Try adjusting your cable first

 

Just a randon thought....but I wonder if the battery connection is loose or there is something grouding out when you sit on the seat. That may cause you to loose power to the fuel pump or something similar. I don't know too much about these things but that is the first thought that came to mind. The throttle issue is also a good place to look. Good luck.