Did the original fat bobs have rubber grommets for the front mounts? I'm having a hard time figuring out if there are grommets or not for the mid-70's fat boobies.

 

No rubber --- some guys will use rubber flat washers under the tabs but the factory bolted them solid to the frame -

the softail had grommets and with center spacers on top tabs 3 each side

 

some times a flat washer as a shim for alignment if need be but as John says solid to the mounts

 

Yep, thats the way I remember it, bolt through tank tabs to frame bungs, no rubber washers and I used Loc-Tite red to avoid riding home with my knees holding a tank half in place

 

Caution //// DO NOT push them in and tighten the tank, space it out if you must - test install and make sure the wiring is away -- another issue to avoid

as i will crack the tank while your riding it

Gas poring on a hot motor at 60 MPH will get your heart pumping -- jz

 

I found a place that sells old chain guard grommets that are supposed to fit the older fat bob tank mounts...anyone heard of using such a system? I worked on a guys sporty once that had fat bobs and I recall he used thick washers on the rear mount. Is there a reason to use thicker washers on the rear mounts?

 

If you want rubber mounts...just mount softail tanks on it....plenty of kits to do that

http://www.ebay.com/itm/Bikers-Choic...-/390813349331

 

Put your rear mounting bolts in the bungs first, then shim the front mounts with washers. That will keep those rear bungs from cracking (which happens a lot from impropper install)