Author Topic: sheet metal seat pattern. (Read 2987 times)

scout18 · « **on:** May 10, 2006, 09:19:08 PM »

I was looking at a bike mag when I noticed that the cool aluminum seats with the bum stop hat you see are made from a simple sheet metal pattern. Anyone here have one cause if you don't I'm gonna make one and post it here.

scunny · « **Reply #1 on:** May 10, 2006, 10:46:22 PM »

go ahead, I am interested in how the flat form would look

ProTeal55 · « **Reply #2 on:** May 11, 2006, 07:34:34 AM »

Quote from: scunny on May 10, 2006, 10:46:22 PM

go ahead, I am interested in how the flat form would look

I agree, I am in the market for a new seat....

dusterdude · « **Reply #3 on:** May 11, 2006, 08:11:10 AM »

ProTeal55 · « **Reply #4 on:** May 11, 2006, 08:31:45 AM »

If you build it (& take photos) they MIGHT buy.....

scout18 · « **Reply #5 on:** May 11, 2006, 04:34:06 PM »

Ok so I tried a pattern last night. I made a miscut on it and made another pattern this afternoon. I need to refine it but I think I am on to some thing. Here is what I have. Any metal shapers out there?

scout18 · « **Reply #6 on:** May 11, 2006, 04:35:37 PM »

Here it is folded

Tim. · « **Reply #7 on:** May 11, 2006, 04:38:17 PM »

Someone's been eating WAY too many donuts.

Seriously - that isn't to scale, is it....

? Or are you an aspiring drag racer, and want to forgoe the traditional fabric drag-chute?

For a better idea of appropriate bum-stop scale, have a look at some CR750 pics on the web, or this:

http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=4637524288

scout18 · « **Reply #8 on:** May 11, 2006, 07:11:14 PM »

You should see my bum, its huge. Hey gotta start somwhere.

AntiRiceCRX · « **Reply #9 on:** May 11, 2006, 07:57:14 PM »

I had the idea to make a new pan, but this time, cover my rear fairing at the same time, that way it would be a one peice seat and fairing. would anyone be intrested?

ProTeal55 · « **Reply #10 on:** May 11, 2006, 08:06:17 PM »

Quote from: AntiRiceCRX on May 11, 2006, 07:57:14 PM

I had the idea to make a new pan, but this time, cover my rear fairing at the same time, that way it would be a one peice seat and fairing. would anyone be intrested?

Let's see what you can come up with.....

AntiRiceCRX · « **Reply #11 on:** May 11, 2006, 08:08:29 PM »

But i need to make my rear fairing/cowl a little taller, especially after raising the front of my bike back up so its only lowered about 1 inch. the rear looks kinda pweuny. But ill crank out something for sure.

bill440cars · « **Reply #12 on:** May 11, 2006, 08:38:18 PM »

Well, I don't know how this is going to work but, here goes. If I can leave a link, check it out . If I can't, I hope some will do it manually and still check this seat out. I know it's on a Yamaha site on XS650
Give it a chance, there's alot of good ideas, I think.

http://www.650motorcycles.com/OBrien.html

(Don't shoot me, yet.)
Later on, Bill

AntiRiceCRX · « **Reply #13 on:** May 11, 2006, 08:41:49 PM »

yea, that looks awesome, i wanna change my rear to something like that, or something like Carpys famous CB750 cafe (the black one with gold frame)

adams77 · « **Reply #14 on:** May 12, 2006, 04:57:56 AM »

I have a supersport too, here is what I did to make the seat

KB02 · « **Reply #15 on:** May 12, 2006, 04:58:29 AM »

Quote from: bill440cars on May 11, 2006, 08:38:18 PM

Well, I don't know how this is going to work but, here goes. If I can leave a link, check it out . If I can't, I hope some will do it manually and still check this seat out. I know it's on a Yamaha site on XS650
Give it a chance, there's alot of good ideas, I think.
http://www.650motorcycles.com/OBrien.html
(Don't shoot me, yet.)
Later on, Bill

That's very simular to what I am dong with my seat. I never would have thought of using a gas tank like that.

Chris Liston · « **Reply #16 on:** May 12, 2006, 05:10:43 AM »

pretty good idea. I've actually thought about taking a mold of the rear tank section and glassing it onto to the stock seat pan.

bill440cars · « **Reply #17 on:** May 12, 2006, 05:45:20 AM »

Quote from: adams77 on May 12, 2006, 04:57:56 AM

I have a supersport too, here is what I did to make the seat

That's a pretty cool approach to building a seat. It's interesting to me to see all the different ways that guys have come up with to build their seat. You could almost devote a section just on seat building, don't ya think? Keep up the good work and we want to see more. Later on, Bill

ProTeal55 · « **Reply #18 on:** May 12, 2006, 06:18:35 AM »

Lots of good ideas, keep them comming....

78CB750F1 · « **Reply #19 on:** May 12, 2006, 08:23:51 AM »

Great ideas! I'm in the middle of building a custom seat pan as well - it will be lower than stock and very close to the frame on the sides but without the cafe "hump" at the back because I often carry a passenger. I am using 1.5" aluminium strips and bending them to shape and then rivetting them into a framework. Photos to come at the end of the weekend when it should be ready (hopefully!) to get upholstered.

scout18 · « **Reply #20 on:** May 12, 2006, 02:40:28 PM »

Adam that is a good Idea. I have an extra tail fairing. Mostly I was thinking that somewhere there is a sheetmetal guy out there with a pattern for a classic style seat. It is pretty simple and if I can get access to a planishing setup I thinkI could turn one out fairly easily. You wouldn't happen to have a 78 SS left sidecover in maroon would you?

ElCheapo · « **Reply #21 on:** May 12, 2006, 08:07:51 PM »

That should be and easy running on the planishing hammer, however there is a pile of shrinking on that pattern to get it right. At first it does look a bit large but once you have your first radius on the top you can run it on a planishing hammer to smooth it and then shrink it in the middle on top.

Of course, I make this all sound simple.

You can also do this with a hammer and a shot bag for the most part.

scout18 · « **Reply #22 on:** May 13, 2006, 08:47:42 AM »

those photos were just a thought process for the sheet metal pattern. Always make it large 'cause you can always cut it down. Which I did I took the hammer to my first pattern to see what it will look like after a few smacks with a hammer onthe dished out stump I will get some pics up today I figure a 3 foot square hunk of .050 aluminum would be plenty ot make a complete seat. I have to go get the aluminum now. Anyone make a planisher from an air hammer? I have some links but I am mainly thinking that a modified mushroom head for an air hammer in the shot bag would accomplish this forme. I' ll have to give it a try

Tim. · « **Reply #23 on:** May 13, 2006, 01:40:05 PM »

The other option that a few people have tried is using one end of a scrap gas tank to form the rounded end of the seat.

bill440cars · « **Reply #24 on:** May 13, 2006, 02:34:05 PM »

Quote from: tintin on May 13, 2006, 01:40:05 PM

The other option that a few people have tried is using one end of a scrap gas tank to form the rounded end of the seat.

Hey tintin, Check my 1st post on page 1 of this subject and you'll see a suggestion of the very
same thing that you have suggested. Check it out. Later on, Bill

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Author Topic: sheet metal seat pattern. (Read 2987 times)

scout18

scout18

scout18

scout18

AntiRiceCRX

AntiRiceCRX

AntiRiceCRX

78CB750F1

scout18

ElCheapo

scout18