Ya when the cover is off on the clutch side you will physically see it not turning over or partially turning over when pedaling and dropping the clutch...you can confirm with taking the plug out and turning over and then with plug in, to see the difference if it is just slipping enough to create not enough rpm's to get running..
Your flooding and possibly plug is fouled and won't spark to burn that fuel running through your system all the way through to the exhaust, sorry to see your having that issue....make sure your choke is off by taking the air filter off and making sure lever is in the right position to be open ..even try to start with air cleaner off as well...and attempt to start with choke off...throttle open...If trying to start it repeatedly with choke on it got too much fuel and has propably fouled the plug and too much fuel in the system....Good Luck Partner..