Recently completed a trip that involved the North Road, the JBR and the Trans-taiga end to end including that last poorly maintained 84kms to the float plane base for gas @ $2.50/litre. Also did a side trip to Wimendji.
Aprox 5400kms with 2200kms of gravel. 9 days, 5 nights of vagrant camping and 3 nights in hotels.
Although you could make this trip on any bike all four of us were riding KLR650's and it made the gravel way more fun as well as easier access to the vagrant camping sites.
If you're planning a trip up that way I may be able to answer some of your question.
Aprox 5400kms with 2200kms of gravel. 9 days, 5 nights of vagrant camping and 3 nights in hotels.
Although you could make this trip on any bike all four of us were riding KLR650's and it made the gravel way more fun as well as easier access to the vagrant camping sites.
If you're planning a trip up that way I may be able to answer some of your question.