Ok , my cbr f4 2000 is not starting. One morning i let it on choke for too long, when i tried to release the choke (after maybe 15 minutes), the engine stopped. I tried to start it again but it never started.

I changed the 4 spark plugs and got the carburator clean at a local bike shop. Yesterday i put it all together and started the engine again... nothing happened.

I took the bike appart again and got the spark plugs out. i saw oil or gaz on the treads... i wiped it , tried it again but the engine wouldn't start.

What can it be ? Please help me...

 

check electrics.