Tether Kill Switch

[TC17]

Hey i'm going to a track tom and they dont let four wheelers in without a tether kill switch. i bought one and it didnt come with directions and i have no idea how to put it on. could somebody please help me. thanx.

[GNCC#829]

I don't know about a 250, but a 400ex, you just unplug the two wires from the coil and insert the two wires from the killswitch, then plug the two coil wires back in.