A couple months ago my quad started acting up and I cannot seem to figure out what the issue is. It idles fine, but at about half throttle it bogs out. If you pull the choke at half throttle it will rev all the way up, but only sitting still. If you try to go up a hill or put it under any load it immediately bogs back out. I’ve replaced the carb, adjusted the valves, replaced the ignition coil, but nothing seems to make any effect. My 4x4 light started flashing without being driven at all meaning my actuator may be bad but could this be causing this issue? And if not what should I try to tackle next?

 

Which quad do you have?

 

That is probably important information. It’s a 2008 Prarie 360

 

If the actuator is bad it could be putting the quad in "limp" mode. Have replaced a few actuators on the 360. Also have you checked the switch on the belt housing?