When I pull the throttle, the bike immediately bogs as until it dies. its as if I was hitting the kill switch. If I quickly turn the throttle a couple of times before it dies it will rev and the rpms will stay up for a couple of revs, then it will bog again. When I try to ride it idles and when I pull the throttle it wants to die so I have to let off unless I keep turning the throttle like I said previously. Any help? We already checked the jets and they were clean. Thanks in advance for the help!