2002 honda foreman 500 Rubicon

I have a 2002 honda foreman 500 Rubicon. Today I replaced my choke cable because it was froze up. After installing I started it up and it appeared to run great like normal I pulled choke to make sure engine would react so I knew it was working and it did. So I thought I’d go drive it around as soon as I put it in reverse it began to move backwards without giving it any throttle at all. I hit brakes and put it back into neutral and put it in drive and it did same thing instantly started moving without giving it any throttle. Usually when I put it in gear it won’t move until I give it throttle what’s wrong or what happend?