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Old Streetfighter Motorcycle Forum Post 04-10-2015, 01:03 AM   #1
kylemason
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Default '81 CB750 - Aggressive Cafe

Hey, bike number two: 1981 Honda CB750

The plan is to turn it into a cafe, and I know this isn't quite the site for it but deal with it because I like the crowd here and DoTheTon and CB750.com both sucked.
Plan:
  • Remove stock headlight and blinkers
  • put gators on forks
  • trim fender
  • box up engine and send to buddy that will do it for beer
  • detab frame
  • design monoshock (either standard or perhaps under chassis like buell)
  • clip ons
  • new tank, thinking benelli 260, not sure
  • design subframe
  • build subframe and seat
  • smaller headlight
  • sell old parts
  • 4-1 exhaust
Here is the goal:

I am looking for a frame bracing diagram I saw somewhere but can't seem to find anywhere not, if you all happen to have one for similar frames I wouldn't mind, as always feel free to give me suggestions as it goes.

Kyle
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Old Streetfighter Motorcycle Forum Post 04-10-2015, 08:05 AM   #2
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Default Re: '81 CB750 - Aggressive Cafe

Quote:
Originally Posted by kylemason View Post
Hey, bike number two: 1981 Honda CB750

The plan is to turn it into a cafe, and I know this isn't quite the site for it but deal with it because I like the crowd here and DoTheTon and CB750.com both sucked.


CF is always the right site. Subbed.
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Old Streetfighter Motorcycle Forum Post 04-10-2015, 09:56 AM   #3
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Default Re: '81 CB750 - Aggressive Cafe

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Old Streetfighter Motorcycle Forum Post 04-10-2015, 01:00 PM   #4
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Default Re: '81 CB750 - Aggressive Cafe

subbed for old s'cool awesomeness. DTT does suck crowdwise but there's some awesome tech articles on there. I've run into the same thing with the KZ forums. Too many purists get butthurt you don't want to build a full restoration. Maybe I should move mine from the cafe forum to this one.

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Fuck it, dying of old age sounds boring anyway...

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Old Streetfighter Motorcycle Forum Post 04-10-2015, 01:01 PM   #5
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Default Re: '81 CB750 - Aggressive Cafe

Subbed. Let's do it.

( and... In before J. )

As far as the frame bracing, these double hoop frames are actually pretty decent. The backbones are already heavily braced in stock form. I've got an '80 F with some additional bracing I can snap a couple pics of.

Any plans for the front end? Just a FYI, CBR F2 and F3 share all of the steering stem dimensions as these bikes, except the stock stem is longer. So those trees will go on with an extremely simple stem swap. No spacers or machine work needed.

Oh, and this place is all about stripping them down and making improvements. Your build fits in perfectly.
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Old Streetfighter Motorcycle Forum Post 04-10-2015, 08:37 PM   #6
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Default Re: '81 CB750 - Aggressive Cafe

In...Like shiny said these frames are pretty stout.

1981 Honda SS Build
KZ1000 Discussion Thread
KZ1000 Build Thread


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u gonna look so sexy naked.... I would say no homo, but totally homo since that that sentence can't not be homo
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Old Streetfighter Motorcycle Forum Post 04-11-2015, 08:09 AM   #7
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Default Re: '81 CB750 - Aggressive Cafe

Heck yea i'm in

Fallen angel build- http://www.customfighters.com/forums...ad.php?t=78474

96 vulcan 1500- http://www.customfighters.com/forums...d.php?t=123177

Fallen Angel Build Off Thread- http://www.customfighters.com/forums...73#post2755273

Fallen Angel Build Off Discussion- http://www.customfighters.com/forums...89#post2755289

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Only weak people test the engine. Real brave guys assemble the bike and then tries to start it
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Old Streetfighter Motorcycle Forum Post 04-11-2015, 09:28 AM   #8
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Cool Re: '81 CB750 - Aggressive Cafe

I like it ..... subbed.
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Old Streetfighter Motorcycle Forum Post 04-11-2015, 02:18 PM   #9
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Default Re: '81 CB750 - Aggressive Cafe

I like the plan so far & am looking forward to seeing it progress

Heres a frame brace plan for you, this is on a gs frame but its tried trusted & works on Honda's too

C, D & E on a stock twinshock frame or just C & D on a monoshock with D providing the place to mount the top shock mount ...... you can use the other braces or similar but unless you are going for big power imho the extra weight isn't justified

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Old Streetfighter Motorcycle Forum Post 04-11-2015, 09:05 PM   #10
kylemason
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Default Re: '81 CB750 - Aggressive Cafe

Quote:
Originally Posted by shinyribs View Post
Just a FYI, CBR F2 and F3 share all of the steering stem dimensions as these bikes, except the stock stem is longer.
I'm trying to keep this one cheap, so I would have to find a pretty good deal on the F2/F3 forks to be worth while, I'm more interested in inverted forks though tbh. If I found a stem match on those I would be tempted, but I want to keep spoked rims.

The stock tank is growing on me, I might paint it and see what I think after before buying a new one.. Looking into buell under chassis suspension if anyone has an extra shock laying around haha

I look off all of the stock headlight and blinkers and fender today, looks 150% better already, i'll post a picture tomorrow for you all. Can't wait to get the frame sorted out with my welder and get started.

Update: Heres that pic.


Like I said, this one will be a "quick build" only lasting about 2 months, hope not to rest too much between items on the to do list
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