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m90 help

  1. M90-Riders
    Looking for some help My 2017 M90 is at the shop for a 240 tire swap, the mechanic showed me there is a gap on the rotor side (right side when sitting on the bike) between the rim and the swing arm, does anyone know what size washer/spacer I need to fill the gap? Threads all say 6mm but Im not...