the bike has sat for two years
unless you specifically filled the tank with ethanol free gas, or used a good fuel stabilizer, then the common 10% ethanol fuel has broken down in the tank. Part of it becomes like little blobs of jello, and it will plug your jets, including the enricher ports of the choke
assuming the gas has broken down you first need to drain the tank and dispose of it
you should also change out the fuel filter
then fill the tank with fresh gas, and a carb cleaner like Seafoam as directed on the instruction
then pull the fuel line off the carbs, point it at a coffee can, and cycle the ignition power on and off a few times so the fresh gas will flow thru the fuel pump - then put the line back on the carbs
before you try to start it again you could cycle the ignition a few more times to fill the float bowls with fresh gas and Seafoam, and let it sit overnight.
While you are waiting pull the plugs out and see what they look like. If they do not look like new, and esp if they are carbon fouled then replace them with new ones
should point out, its not recommended to start the bike up and let it sit and idle - normally when you start the bike, check your lights and brakes, and then ride off. The mixture is very narrow for idling, but when you are riding the PMscrew main ports and the main jets engage, and you have a better control over the fuel mixture
after letting the float bowls soak overnight try starting it the next day. If you can get it to start up, push the choke in a bit and take it for a ride. Push the choke all the way in about a mile down the road.
Riding the bike with carb cleaner in the fuel will flush out all the parts of the carb. To clear out the main jets you need to crank the throttle pretty hard when you can, like going up a steep hill in 4th gear - the more gas flowing thru the jets, the more it will flush out the gunk.
If you get it running it could take a full tank of treated fuel to get it cleared out and back to normal.
One other side note, its possible to drain the battery down by cranking the engine to the point where the starter will spin a bit slower, but the battery voltage will be down below 10 to 11V and the electronic ignition will just drop out - you will get no spark and the bike will not start no matter what is going on with the carbs. If the battery is dropping while cranking you will need to put it on a charger.
So - if you are sure your battery is fully charged, and the bike still will not start after all this, then you will need to consider cleaning the carbs manually, or taking it to a shop to have them clean the carbs.
EDIT: Forgot to mention, if the bike sat for 2 years with no gas in the tank, the tank could be full of rust, sucked into the fuel filter, and possibly making a mess in the carbs.
Problem with rust is a carb cleaner cannot dissolve it.
Last edited by KCW; 06-20-2019 at 08:54 AM.