Yes, I have discovered the same clearance issue: wiring harness to tank with the new harness I installed from D'fly. I believe I correctly routed my harness along the left (near side) of the frame.. Initially I had it tie-wrapped to the lower longitudinal frame member, but found that severely caused the tank to be offset to the right. Then I moved the harness upward toward the upper frame member, and that helped a bit. My harness has a black plastic/rubber flexible sheathing over the cloth covering.. can't remember if it came that way, or I added that myself, but, yes, it does tend to "round out" the harness bundle rather than flatten against the tank. Yesterday I was looking at the bike again and do note that there is a threaded hole on the headstock, about midway between the upper and lower bearings, one on each side. When the clip arrives (along with the recommended screw) I'll likely install it on the far side to give a little direction to the flapping speedo cable.
Phil Auldridge Austin, Texas - USA
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53 SQ 4 MK II, '72 Norton Commando, '78 BMW R100/7, '79 Honda CBX, 2014 Indian Chief Vintage