Ok so it's a brand new ruckus 2021 5000 miles or so couple oil changes and last week or 2 it hasn't been starting easy would have to hold the gas open to get it to fire and start and if throttle was let go to idle would automatically die I pulled it apart the fuel pump wasn't pumping like I thought it should replace it filters fuel and air and new plug but the plug Amazon sent was wrong went to start it and it won't start it fires and starter is spinning tire and trying to but it doesn't fire and start up I pulled the plug and checked compression it has compression so I poured a little fuel on end of plug tightened it up and tried to start it quickly and it started and ran full speed but when idle it just dies went to start again and won't start on its own any ideas on what could be causing this problem?? Thanks for the help

 

If you give it a little throttle on startup and hold it for a while to get the engine warm, will it stay running? Sounds like it could need a valve adjustment.

There is a great video outlining the diagnosis and adjustment process here: