BMW rider. I'ved done the Nord rt, JBR, taiga ride. When you do the taiga you can ride about 80km of gravel past the hydro site at the end. This will bring you to a fly in outfitters where you can get gas. There are places to buy gas along the taiga as well.
Note that there is almost no place to camp along the way. The trees are too small to log so no logging roads going off it. We ended up pulling into an First Nations hunt camp that wasn't being occupied and camped there. Let me know if you have questions I might be able to help.