Gen. 2 wheels in a Gen.1?

[Red Ceri]

I think you need to consider the disc diameter on the front wheel if you are using the Gen1 forks,  as the Gen1 Discs have 6 bolt fixing and 298mm Diameter vs 5 bolt on Gen2 and 310/320mm Diameter discs as standard. So the caliper won't be allow the larger discs of the Gen2.