Sorry my mistake ... If your master won't fit then get a 3TJ one ... it's proabably common with the FZR600R Foxeye or the Thundercat, but I think the seller is covering himself because your using it for a different model.

Incedentally - how are the front brakes ??? Aren't they twin pot calipers on the Genesis at about 83mm bolt spacing ???

I have yamaha R6 blue dots, 100mm spacing on my 400 forks.