I am 18 years old and have a 2001 Kawasaki Ninja ZX12R and would really like to get this problem fixed before snowfall and storage. Well anyways here is the story. Me and some friends from work go down behind a old shut down truck stop here in Toronto to do stupid stuff with are cars and bikes. We go here because it has a very large parking lot and no traffic. That is where this problem started. One of my friends from the army wanted to drag race my bike against his car to the end of the lot. So I said sure. He really could give me a good go. His car is a old Trans Am that has been modified to hell, it has a 426 Hemi engine in it. Pretty much if you put wings on it and it would take off and fly. When the time came to race he floored it and I twisted the throttle hard and my bike did nothing but choke, chugged, and choked again and then it stalled. Ever since then, when I twist the throttle hard its like it has no hp and it takes about a minute to reach 120kph. It has also begun guzzling down gas. But now a month has gone by and it has gotten worse. It is always chugging and stalling even when sitting at a steady idle. Another one of my friends who is in the army is a vehicle technician there. He has no clue what it could be and neither do any of my other friends. So that is why I am here to see if anyone knows what it could be before I go and put it into a shop. So if anyone could tell me what is wrong or might be wrong I would really appreciate it.