Anyone moulded a seat foam ?

Grewth

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I'm just weighing up my options.
I've got a seat to refurb, the 50 yr old foam is both hard and brittle now.
I've got the option of buying a ready made (pattern) seat foam, or attempting to make my own.
The You Tube tutorials seem to point to carving down a foam block.
I'm wondering if I could mould a foam like the factory did ?
The pattern item might seem the obvious route, but all too often I've been sadly disappointed by so called "perfect" replicas
 

miketweedie

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I've done "pattern foam" in my old VW, and it worked as described. For my buddy's café bike I got some high density and some softer memory foam slabs and used both. bottom is higher density and top is memory foam, which holds you in nicely. I just used spray adhesive to hold the layers together, then mounted it to the seat pan and cut with a bread knife. You can shave the tapers you want with sandpaper.

If pre-cut is an option, I'd probably go that route again as the process was simple enough but getting it how you want it isn't the easiest. I probably saved $40 over buying an off the shelf foam kit for his. On my own café bike the seat is 100% custom, so my only option will be to make my own (or have an upholstery shop make it)
 

WideAWAKE

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I'm just weighing up my options.
I've got a seat to refurb, the 50 yr old foam is both hard and brittle now.
I've got the option of buying a ready made (pattern) seat foam, or attempting to make my own.
The You Tube tutorials seem to point to carving down a foam block.
I'm wondering if I could mould a foam like the factory did ?
The pattern item might seem the obvious route, but all too often I've been sadly disappointed by so called "perfect" replicas


Only way your gonna pour your own “pattern” foam is if you got a mold to pour it into. I’ve made a few (not for seat foam) it’s a ton of work, in no way worth a 1 off.

Build and cut it from a block, or buy one already made.

At least that’s my take on it.
 

Marlin72xs

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Yes, the youtube stuff is interesting and the use of an electric carving knife appears to work well. I bought some foam , 2 types, to attempt to redo the 72 seat because as you mentioned, after 50 years or so, it looked like I was grating cheese on the battery and tool compartment. I tend to ponder a long time over jobs like this, then Mikes had a blemished seat at a reduced price, so I bought it. It's too hard though. And after riding my Virago, (a very plush saddle, indeed), it feels like a cinder block.
When I find the time, I'm gonna tackle the gluing, cutting and forming the foam I bought! Good luck with yours!
 

Marlin72xs

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I forgot to mention that when I took my original seat apart, the seat base was rusted badly where it touched the foam. There was no repairing it. That's why I bought the blem from Mikes. The only blem was a bent side mount and the Yamaha across the back was not centered.
Some day I'll get to it! Again, good luck with yours!
 
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Wingedwheel

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I haven’t really looked yet but who sells the pre-formed seat foam? When I get to the ‘77 it’s got the old K/Q with a big mouse hole right in the center. The pan is excellent so I’d prefer to be able to use it. I would have to find a replica cover as well.
 
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