'82 cb650sc project

General motorcycle conversation

Moderators: Volker_P, tidd650

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

'82 cb650sc project

Postby kerryb » Sun Oct 28, 2018 10:05 am

Hi, new here, new bike. '82 650sc going for the "cafe lite" treatment for the first time around. The plan is to minimize the cruiser look with changes to tank, seat, and handlebars, without compromising the stock frame yet. Having some difficulty researching which tanks might fit. The stock tank from my '78 cb750 is too narrow at the mounting pockets, as are all the vintage beemer tanks I saw yesterday. I read somewhere that a gt380 tank from suzuki is a good choice. Can anyone suggest another choice that will fit without modifying the tank?
Pics to follow.

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Sun Oct 28, 2018 3:37 pm

Here are the promised pictures...as we got it and initial mockup of possibilities. the mocked up tank and seat are borrowed from an on-going cb750 project, so they are for visualization purposes. Plans also include handlebars in a clip-on position or a modified set of clubmans. Headlight and gauges would be lowered and gauges would be from an earlier decade so they would be separate from the idiot lights which would be a row of led's

comments welcome.
Attachments
IMG_4441small.jpg
IMG_4441small.jpg (99.01 KiB) Viewed 6778 times
IMG_4438small.jpg
IMG_4438small.jpg (97.81 KiB) Viewed 6778 times
IMG_4429small.jpg
IMG_4429small.jpg (100.1 KiB) Viewed 6778 times

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Sat Nov 03, 2018 2:03 pm

Over 100 views...and not one comment? You are too polite or I'm on the wrong forum.

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Mon Nov 12, 2018 11:00 pm

Peg mount
Attachments
IMG_3728small.jpg
peg mount
IMG_3728small.jpg (170.46 KiB) Viewed 6264 times
Last edited by kerryb on Tue Nov 13, 2018 10:50 pm, edited 1 time in total.

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Tue Nov 13, 2018 12:28 am

Gauge mount, white face clocks from cb750
Attachments
IMG_3733small.jpg
IMG_3733small.jpg (198.17 KiB) Viewed 6264 times

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Tue Nov 13, 2018 10:56 pm

Is this hump too big and wide?
IMG_4436small.jpg
café seat
IMG_4436small.jpg (98.39 KiB) Viewed 6264 times

User avatar
Volker_P
Posts: 5347
Joined: Mon Mar 06, 2006 1:53 am
Location: southern Germany

Re: '82 cb650sc project

Postby Volker_P » Wed Nov 14, 2018 5:22 am

It looks not bad at the first pictures but at the last picture the width looks quite much.
Might be just a camera focal width/perspective issue however.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Wed Nov 14, 2018 2:38 pm

no, it's not the camera angle. This seat was made to use the stock seat pan on a '78 cb750k to retain the seat hinges and latch. I have some other ideas that will be much smaller. will post pics later.
Another question that crosses my mind is whether there is value to having a rear inner fender to protect the back of the motor and the under seat area. I'm thinking a small fender, tight to the wheel, mounted to the swingarm would be less intrusive to the look we are after. opinions or comments welcome. The fender would most likely be made of fiberglass to hug the rear tire.
Attachments
IMG_1524small.jpg
seat hinges
IMG_1524small.jpg (122.81 KiB) Viewed 6180 times

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Wed Nov 14, 2018 2:45 pm

Maybe like this?
Attachments
IMG_3710small.jpg
seat hump?
IMG_3710small.jpg (140.79 KiB) Viewed 6069 times
Last edited by kerryb on Fri Nov 16, 2018 9:22 am, edited 1 time in total.

User avatar
Volker_P
Posts: 5347
Joined: Mon Mar 06, 2006 1:53 am
Location: southern Germany

Re: '82 cb650sc project

Postby Volker_P » Fri Nov 16, 2018 5:48 am

kerryb wrote: Another question that crosses my mind is whether there is value to having a rear inner fender to protect the back of the motor and the under seat area.

If you are not going to keep the stock airbox (most cafe builds imply pod filters, so I simply assume yours, too) a fender is probably a quite good idea.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Fri Nov 16, 2018 9:18 am

Oh yeah, that!...I'm not going with PODS, been there, struggled with that when the PO originally got the bike. It ran so much better with the pods removed and a stock air box reinstalled. I'm going to keep the portion of the air box that contains the carb boots. The air filter section will be reworked to house a flat style filter, hidden under the seat in a horizontal position. I don't mind carb work, but a proper air box seems to have the best all-round performance, so we are keeping that. working on mockups, no pics yet.

I do have a pic of a little more refinement of the footpeg adapter.
Attachments
IMG_4450small.jpg
footpeg adapter
IMG_4450small.jpg (96.33 KiB) Viewed 6069 times

User avatar
Volker_P
Posts: 5347
Joined: Mon Mar 06, 2006 1:53 am
Location: southern Germany

Re: '82 cb650sc project

Postby Volker_P » Wed Nov 21, 2018 2:28 am

The RC08/SC is probably the most far off starting point for a CB650 cafe like project due to the frame, instrument box, handlebar mounts, footpeg alumina and some other stuff.
But by that:
kerryb wrote:Oh yeah, that!...I'm not going with PODS, been there, struggled with that when the PO originally got the bike. It ran so much better with the pods removed and a stock air box reinstalled. I'm going to keep the portion of the air box that contains the carb boots.

you probably spend less time and nerves than someone who tries something similar with a '79 and pods! :lol:

So you have to consider where to place the airbox opening and you probably can find a place/angle where a rear fender is not necessary. There are several reports here that even the air filter cover makes a difference at least for the piston carbs. Probably not relevant for the CV carbs but better avoid to have air pressed into the airbox at high speeds (like "ram air") because all stock CB650's seem to be already on the lean side. So you won't like to shift it even further to the lean side when it runs hot and at high revs on the highway.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Wed Nov 21, 2018 1:08 pm

I have cleaned enough crud off the inside of fenders to make me want to avoid having to clean the same crud off the underside of everything else in that area. A minimal fender mounted to the swingarm seems like a good idea to me. Also giving major thought to changing the frame area under the seat. A pair of straight rails with an upswept hoop would solve a lot of headaches and curvy parts. stay tuned for future developments.

User avatar
GeorgeSweety
Posts: 334
Joined: Tue Aug 08, 2017 11:47 am
Location: UK.

Re: '82 cb650sc project

Postby GeorgeSweety » Sat Nov 24, 2018 6:53 am

kerryb wrote:I have cleaned enough crud off the inside of fenders to make me want to avoid having to clean the same crud off the underside of everything else in that area. A minimal fender mounted to the swingarm seems like a good idea to me. Also giving major thought to changing the frame area under the seat. A pair of straight rails with an upswept hoop would solve a lot of headaches and curvy parts. stay tuned for future developments.


If you no longer need the side panels and they are for sale I would be interested. :D

kerryb
Posts: 22
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: '82 cb650sc project

Postby kerryb » Mon Nov 26, 2018 9:36 pm

[/quote]

If you no longer need the side panels and they are for sale I would be interested. :D[/quote]

Duly noted... I'll take some pictures for you and we'll discuss them.

So I dropprd off my plans and tubing to replace the seat area of the frame. Once I have this mod done we can begin fabrication of the custom airbox inlet and electrics placement.


Return to “General Discussion”

Who is online

Users browsing this forum: No registered users and 10 guests