Before Harley got on board with the metric system (Japanese forks), the fork tubes were specified in inch dimensions. 33.4 mm is a "soft" conversion to metric. 33.4 mm = 1.315", 1 5/16 = 1.3125. Same way with the Wide Glide which was originally 1 5/8" (1.625") until the Japanese version came along at 41 mm, or 1.614".I have 33.4mm also....called 1.3whatever inch in the harley books. I don't think they were actually called 33.4mm until the 35mm came out.
First you need to know whether you have Showa or Kayaba sliders. Easy way to tell, the Showa have bolt on axle caps on both lowers, the Kayaba only on one side. As for the length, the FXS (Lowrider) and FXB (Sturgis) came with fork tubes that were 2" longer than the FX and FXE.I just picked up narrow glide trees, 35mm and 1" neck, to put on my '75 FXE build. I want 4 over tubes and need some help.
Which part number should I order?