Hi I just purchased my first ATV. The previous owner told me he thought bike had an injector problem and even provided me with a new injector upon purchase. Well I changed out the new injector and put in a new spark plug. Cleaned all connectors putting dielectric grease all. Well turn on the key hit the button and the bike just spins and will not start. Pulled the plug and che led it's sparking. Rechecked injector still won't start. Eventually "FI" showed on screen. Disconnected the battery to reset the ECU, "FI" disappeared off screen but bike still won't start. Bike was started on trailer backed off and pulled into the shop only parts changed were injector and spark plug. Anyone have a suggestion on what I should check next, any help would be very much appreciated.