Good question ambike. The bike uses a lower left fork leg on the right (no tab for the brake stay), or a modified right lower fork leg. Not sure if that has anything to do with the extra axle length. I really don't think it would. Forks seem to work fine. If I remember correctly, the stock axle nut had a flange built into it, making it wider along with the washers.Great-looking bikes !
Curious Question, M-68 Bul : Front axle has extra threads showing. An OE nut is longer, but not much. Are those legs pulled-in ? Spacers a bit narrow ?