I just installed Kuryakyn's gas cap on a 07 Fatboy, it doesn't seem flush to the tank on all sides is normal? I don't want to over tighten the cap and scratch tank.
To be honest they DON'T completely mount precisely "flush flush" per say. I mean they are close. The gas cap side just screws down with two adapters sent in kit and a large flat screw driver. The guage just "pops" down in like stock. There is probably a 1/16th of an inch or less between the mounting and the tank. I really like the looks and you really don't notice how the fit isnt really "exact". I really figured they would be like the HD ones and fit pretty snug to the tank, but I guess they want to be different! LOL. Easy to mount,(both of them) and easy to calibrate(guage). You'll be happy Im sure! I can snap a few pix and show ya. Good luck. K