[Lillnaisarn]

I have got a crf450r-19 that im not sure what's the issue are.

I have so far:
- Changed the sparkplug
- Dissconnected kill switch
- spray start fluid and dip sparkplug in fuel

The bike dont want to fire up at all .

[JimDirt]

Welcome to the site !!

Is the MIL light blinking when starting ?? .... Also , when you dipped the plug in gas , it did not even try to start ?? , not even a pop ??

Can you hear the fuel pump when cranking ?? , and have you removed the gas cap vent line to make sure it is not clogged ?? , or removed the gas cap to see if you hear any air ?? , like when you open a fresh jar of pickles and it pops , this would indicate a clogged vent line or gas cap , if it is not venting it will vapor lock the system

Also , have you checked the valves ?? , if the valves have closed up , that will not allow it to run , and how many hours are on it ??

Usually if it is a fuel issue , the gas dipped plug will usually do something , so if it did not , that might mean it is valve related

One last thing , did you recently wash the bike and try to start it afterwards and that is when this happened ?? , if so , you need to unplug every exposed connector and blow it out with air and reconnect and try again . water may be shorting the system out (a dirt bike you cant get wet , go figure , but it happens)