Bike sat forever and Carb needed a cleaning and new pilot jet (clogged) and accelerator pump diaphragm.
The accelerator pump does not function. I think the check ball in the float bowl is hanging up and not allowing pressure to build and squirt the fuel through the passage in the Venturi.
I came across this How To Article
https://www.crfsonly.com/howto/keihin-f ... rf450r.php
It doesn’t state if this applies to all 2002-2008 CRF450Rs and all diaphragm kits for the bikes. What I need to know is has Honda updated every AP Bowl with the check ball in the new AP Cover that requires the original Float Bowl Check Ball to be removed?