How are custom seats attached to the frame?

[Hetzer]

When it comes to custom cafe racer seats (the ones shaped in foam and then covered in fiberglass), how are they attached to the frame?

 

[Titan performance]

We use mild steel strapping, about 2" wide, bend it to follow the shape of the seat, and bond it in. If needed, we sometimes bond in some ply, to add strength to the seat unit.
I think it's essential for the overall appearance of the machine, that the bracketry (is that a word?) is all kept out of sight.....

 

[gtermi75]

What kind of adhesive do you use? How does it hold up, I used some 3m panel adhesive on a tail section and you can now see the line where the steel strap is.

 

[SONICJK]

I prefer to just superglue the seat to the frame rails. Just keep a tube handy for when you need to rip it ff and glue it back on.

In all seriousness industrial velcro is awesome.

 

[mathil]

What kind of adhesive do you use? How does it hold up, I used some 3m panel adhesive on a tail section and you can now see the line where the steel strap is.

The fiberglass is flexible, and fairly thin, so it needs some sort of "padding" to keep it from printing through where the support is. Ideally this is worked in to the core design of the seat, but you can add it after. Best practice is to expand the contact patch of the support, and to taper the supports thickness from full thickness to nothing over the largest area possible.

 

[M.B Co]

I used the stock cross bar on my frame and used lag bolts and wing nuts. I am now running lock washers as I did loose one, lol.

Untitled by MBCo, on Flickr

 

[Slantyface]

I mounted some melamine plywood specifically cut and routed to the shape of the underside of my seat. I mounted the plywood to the frame. Then, a healthy amount of industrial strength Velcro on the underside of the seat and on top of the plywood. If I could go back I would reconsider using so much Velcro. It actually threatens to break the seat as I pull it off...