Hey so I just picked up a 04 CBR F4i and when I bought it from the guy it started up after some time and I gave him the benefit of the doubt because it was very cold. Long story shoot it wont turn over now, it will crank and I might hear one cylinder fire or pop every now and it has turned over once and when it did it was completely unresponsive and died very soon. I tried starting fluid and it would not run off of that. My number 1 suspicion is that the plugs are bad and they aren't sparking and I plan on changing those today but I did notice the Coolant temperature is not being read and when I looked up the wiring diagram it looks like the coolant temp sensor also gives power to the throttle position sensor so I wonder If that could also be the problem.

 

Welcome to the forum, sorry to hear that you are having problems.
Follow this guide from the manual and it should get you started. More likely to be fuel related.