Author Topic: does anyone have a checklist for fiberglassing a seat pan?  (Read 1691 times)

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Offline 547

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does anyone have a checklist for fiberglassing a seat pan?
« on: April 30, 2009, 05:24:41 PM »
I am going to buy supplies to fiberglass a seat pan for my 78 cb750. It's going to be just a pan to make a seat like
the ones you see on the brat style bikes, long an narrow with no cowl.
I am starting fresh so I need all supplies at a low cost hopefully.
Any suggestions are greatly appreciated.
j-

Offline kghost

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #1 on: April 30, 2009, 05:55:30 PM »
Gloves..get gloves
Stranger in a strange land

Offline mikethejeepguy

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #2 on: April 30, 2009, 05:59:39 PM »
I found this post super helpful....

http://dotheton.com/index.php?topic=3070.0

Am looking to tackle the same project soon. Hope it helps.
'76 Honda CB550F, Dana-S'd, Uni filtered, HID'd, LED'd, and mildly cafe'd with many plans still.

Offline 547

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #3 on: April 30, 2009, 07:04:51 PM »
thanks mike, i have been searching the web for different approaches and every time i find one i get discouraged. the glassing does not seem to difficult but making the mold. i like the method of making a dedicated pan by just taping up your frame and laying out directly onto it but i get mixed reviews on that. i am not too sure on which way to go.

kghost, thanks for the reminder. i always get into projects without getting gloves. then by the time i decide i need some my hands are already falling apart.
j-

Offline kghost

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #4 on: April 30, 2009, 07:08:02 PM »
Last one I did I made a mold out of the stuff they stick artificial flowers in.

Its that greenish foam...and its dirt cheap at the hobby/foo-foo womans stores...like the hobby lobby.

Its soft, it cuts easily with a carving knife....doesn't sand super well.

Makes a hell of a mess with green dust everywhere but its cheap and simple.

The decent foam for a mold is about three times as much.
Stranger in a strange land

Offline 547

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #5 on: April 30, 2009, 08:06:58 PM »
Last one I did I made a mold out of the stuff they stick artificial flowers in.

Its that greenish foam...and its dirt cheap at the hobby/foo-foo womans stores...like the hobby lobby.

Its soft, it cuts easily with a carving knife....doesn't sand super well.

Makes a hell of a mess with green dust everywhere but its cheap and simple.

The decent foam for a mold is about three times as much.

thanks for the tip
j-

Offline Sweep

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #6 on: May 01, 2009, 04:33:39 AM »
The last one I did I put plastic wrap down over the seating area and a wide area of the bike to protect it from the resin mess.  I then formed aluminum foil over that to make the shape I wanted and fiberglassed onto that.
'76 cb750K Wiseco 836|ape crank/head|Carillos|CR29s|Dyna 2k|Kerker
'74 Norton Commando Fastback w/belt and bells

Offline 547

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #7 on: May 01, 2009, 09:56:14 AM »
The last one I did I put plastic wrap down over the seating area and a wide area of the bike to protect it from the resin mess.  I then formed aluminum foil over that to make the shape I wanted and fiberglassed onto that.
that is what i was going to try. how did it turn out for you? and what kind of supplies did you need?
j-

Offline bikerbart

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #8 on: May 02, 2009, 09:22:21 AM »
I did it the hard way.I made a skeleton frame out of alluminum(rivets)then metal tape(hvac mend stuff)then laid fibreglass and resin.No mold or anything,never did it before and this was before I even knew about this website.Turned out pretty good,upholstered the seat and bumstop too.Its not perfect but better than some I have seen.I will post pics on monday.Also I painted it black then laid another coat of resin with metal flakes in the resin,pretty slick.
its better to regret something you have done,than something you havent.Except playing with explosives.

Offline Sweep

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #9 on: May 02, 2009, 09:27:32 AM »
The last one I did I put plastic wrap down over the seating area and a wide area of the bike to protect it from the resin mess.  I then formed aluminum foil over that to make the shape I wanted and fiberglassed onto that.
that is what i was going to try. how did it turn out for you? and what kind of supplies did you need?

It was messy and it is a very, very messy job.  You can't protect the bike and surrounding areas enough.  It worked out great but it was on a bobbed harley softail that I had lowered with a stubby rear fender.  I got it covered at a local auto top shop and a couple of my friends say it was the best bike I ever did and I got top dollar for it on ebay.  You'll need...

-Fiberglass matting
-Resin
-Hardener
-A bunch of those plastic spreaders.
-A couple boxes of good disposable rubber gloves.
-A nice breathing filtered mask or at least those paper jobbies.
-An angle grinder with some cutting, grinding, and sanding wheels.
-A dremel comes in really handy for angle cutting and sanding hard to get places.
'76 cb750K Wiseco 836|ape crank/head|Carillos|CR29s|Dyna 2k|Kerker
'74 Norton Commando Fastback w/belt and bells

Offline bikerbart

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #10 on: May 04, 2009, 12:14:42 PM »
heres mine.
its better to regret something you have done,than something you havent.Except playing with explosives.

Offline 547

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Re: does anyone have a checklist for fiberglassing a seat pan?
« Reply #11 on: May 04, 2009, 02:52:46 PM »
nice job bart. looks great.
j-