Yes it is a right hand thread. Once you have the nut off see if you can wobble the flywheel pulling upwards as you wobble,just with your fingers. If not you can (being very carefully) use screwdriver to assist,but don't (and I mean don't) use a lot of force with screwdriver as flywheels can and do sometimes break in middle. So with the screwdriver your only seeing if it will come off easily. So please I can't stress enough very little force with screwdrivers. If it is going to be hard to get off you will need some kind of puller. I use a harmonic balance puller,seems to work very well.
