Noticed you had one on your old bike. Did you manufacture that ? I looked at mine and don't see an area to mount one unless it goes through the axle...
We tried the motosportz, enduro engineering, and moose none would fit on the 04 125. We welded tabs on the caliper carrier, like the 01-02's had and used a bolt on fin.
Actually tried and old Rooster one my dealer had ... it took the place of the spacer block, didn't have to remove my rear wheel
started out as a Rooster, ended up plucked and swiss cheesed/lightened, it been on my 04TC450,06TE450 and now still on my 08TXC450. the thing is bullet proof and has survived mega hits and scrapes.