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Discussion Starter #1
I recently bought one of those cafe-style fiberglass seat pans, plan on having it upholstered. Wondering how everyone else came up with a mounting solution. It's going on a 73 cb750, replacing the hideous mustang-style seat. I'm almost certain that I cannot retain the seat pan from that and use it for the cafe-style seat. What is the best thing to use underneath the pan to back it up and mount the hinges and seat lockpin to? Right now it's just a fiberglass shell with a gelcoat. No way in hell I' just going to drill it and just bolt the hinges up.
Any suggestions? Thanks for the help.
Noah

Leadership is action, not position.
 

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Discussion Starter #2
To clear things up, this is what I bought:
Cafe-style seat, bumpstop seat, CR750 seat, whatever...


Leadership is action, not position.
 

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I've seen it done with plywood (1/2" or thicker) and rubber watherstripping. Cut the plywood roughly 1/8" to 1/4" smaller than the seat area. Get some 1/4" to 1/2" weatherstripping and run around the egdes of the plywood where they would contact the seat pan sides. Should be a snug fit. Glue the plywood to the underside of the 'glass pan. Any manner of bolting/clamping this to the frame can be used (I can't recall what the top of the frame looks like on a 750, I've only seen it done on 350's) but the most important factor of course is the need to dampen vibration. The best setup I've seen had carriage bolts (round headed deals) running through the fiberglass and plywood with rubber grommets at the bolt head and in between the plywood and frame.

There are probably better ways, though. I'm kind of a hack.



Honda go sideways!
 

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I used the outside holes for the battery box and the holes for the tool tray to mount mine. Used Delrin spacers to get the seat level with the rear tank mount.

Heres a pic of mine. If you want more detailed pics let me know.



1974 Kawasaki H1 500
1976 Honda CB 750K
 

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Discussion Starter #5
Sweet! That's funny, I actually had some Delryn in mind, thought about using a whole sheet, but that's a little expensive...
I'm still trying to get a good procedure going here, trying to figure out how to mount it after its been upholstered. Maybe I can have the leather guys attach the upholstry with heavy-duty snaps, so I can mount the seat like you did, and then simply snap the covering on. Whatever I figure out, I will throw up some pics.
Fixed pic for you.



Leadership is action, not position.
 

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I used round stock Delrin......maybe about 1 1/2" - 2" in diameter. The spacers on the tool tray side are a little taller than the battery box side. I also had to "flat spot" the ones in front...at the tank. That stuff is super hard and hard to cut. I ended up using an angle grinder to burn it flat.

My father inlaw does upholstery and is in the process of making my cover. Will be using stainless snaps on 2" centers down the sides and up over the hump.

1974 Kawasaki H1 500
1976 Honda CB 750K

Edited by - Zeke on Apr 03 2006 10:55:01 PM
 
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