Honda Twins banner

1 - 6 of 6 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter #1 (Edited)
Hey all, looking for some help/suggestions on how to handle putting a seat on this bike. It came with a bobber (?) seat but I want a cafe racer style. Ideally I would like to tuck in the wiring between the seat and the frame, if I were to get some form of bracket to hold the seat up above the frame. The cardboard box was what the PO wanted, to build a tray to hold everything (it would sit higher attaching to the tank bolt).
When I was searching around, it seems everyone does these seat hoops, but I do not have any holes for the seat hoops to attach to, I just have these tabs with 2 holes.

I should mention this is a 1980 CB400. I'm wondering if what I'm looking at in the 1st image is how they were made and I'm missing the rear piece. The holes don't look welded on (but I'll check again when I'm home).




 

Attachments

·
Registered
Joined
·
500 Posts
Best advice is to look at videos and pics off the internet. Dime City Cycles have a video making its own, witch i base my seat off with fiberglass. Classic Octane took measurements and sent them to a company and also has lots of videos about frame hoop, battery box and seat mount. For the bold has the same videos as well.

You don't have to stick with the PO brackets, do it once and do it right. The more you look around, the more you'll know what you like and want. I have 2 seats myself, 1 cafe i made and the original i trimed down, reshaped and got upholstered, all using the original machanisim to secure them.

Let me know if you need more...
 

·
Registered
Joined
·
500 Posts
The only thing I would do differently is to have one seat for both, just have a small cowl to put on top of the back of the 2 seater to make it cafe.
 

·
Registered
Joined
·
13 Posts
Discussion Starter #4
The problem is, I don't think the PO welded the 2 hole pieces there (or at least it doesn't look welded). It looks to me like the CB400 comes that way, and they simply removed the rear seat and any rear frame part but it's really tough to tell and hard to search. This parts diagram even looks different. I'll have a closer inspection.
https://www.bikebandit.com/oem-parts/1980-honda-hawk-400-cb400t-frame-body/o/m151810sch18131

I don't know how to weld or make anything out of fiberglass but I will explore ways to make a bracket to hold a seat up as well as 3D printing a seat pan.
 

·
Registered
Joined
·
500 Posts
I didn't know how to do fiberglass either, took me a couple times. The first time I made it too short, you have to lay the fiber way pass your template. You don't have factory manual? There is a topic about it. Let me see. The holes at the end of your frame are not what you should have, look at the picture you sent carefully. There should be 1 big hole for the flashers.

Here it is:

https://www.hondatwins.net/forums/61-manuals-technical-documents/3192-honda-manual-1978-81-cb-cm400.html
The first guy has a link. If it doesn't work, send a PM to dtsmjr8dan (a guy from Winsord, ON) to send one to you. You need a manual.
 

·
Super Moderator
Joined
·
22,709 Posts
1 - 6 of 6 Posts
Top