Take it apart and check for broken wire at trigger.

to get the broken sled first, you need to say your name is Malasian Cheese. (If you do this on Halloween it will trigger the zombie invasion so watch out) then, if everything works, the broken sled will pop up on the secret map laeding you to it.

Probably only $15-25.

Either your throttle cable is broken or disconnected. The cable has like a ball with flat sides soldered on both ends that connect the carb to the trigger. If that comes out of either the carb or the trigger it won't work. If that is in place on both ends it maybe be broken or very frayed in the middle somewhere. If you can't see if it's broken, disconnect it from the carb and pull on it, if it comes out it's broken. They really aren't repairable, you'll have to get a new one the correct length for your machine.

Only you can decide if it is worth the money to fix it.