Hey man did you end up getting this figured out. i'm doing to the same thing. Trying to buy a m8000 will apparently only 900kms on it and the gauge and headlights don't work.
Last season I decided to get into riding again i'v had bikes growing up. I picked up a 2007 Suzuki rmz 250f. I got used to riding on it and very comfortable I would say in about 5 rides. At times I wish I had a bit more power. I'm not a great rider but I do mostly trial riding, not many tracks.