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Author Topic: 1971 CB750 Cafe Build  (Read 1209 times)

Offline Carmmont

  • Posts: 4
1971 CB750 Cafe Build
« on: Mar 15, 2017, 00:02:29 »
Hey guys. Just got myself a 71 cb750 k and I have been lurking around and researching what to do with her. So far I have the whole thing stripped and all parts for the frame ordered. I have a good idea what I need to do there. The issue I have is that the front end is shot. Nothing really seems to be worth the time and I want to upgrade.

I found the R6 front end can be converted to the 71 with new bearings from all balls racing. The question I have is can that be done with the r6 stem and trees or am I being naive that the bearings is all I need to worry about?

Thanks in advance for the help. Attached are a few photos of how she started and progress. Before I get kicked for it being decent, the pic is deceiving. It ran great but the suspension and overall tightness of the unit was rough.

Offline Luugo86

  • Posts: 642
  • '73 CB350, '78 XS650 Cafe Killer
    • ToadStool Cycle Co.
Re: 1971 CB750 Cafe Build
« Reply #1 on: Mar 15, 2017, 00:11:45 »
That's a nice bike dude
Live to Die, Die to Live

Online CrabsAndCylinders

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  • Posts: 1567
  • Careful With That Axe Eugene
Re: 1971 CB750 Cafe Build
« Reply #2 on: Mar 15, 2017, 00:44:13 »
Looking forward to this, are you going to keep the seat, it has nice lines.

I don't know about this swap but sometimes you also have to take the existing stem and press it into the new triple clamps, in addition to the bearing swap.  Others here will know.
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Offline Carmmont

  • Posts: 4
Re: 1971 CB750 Cafe Build
« Reply #3 on: Mar 15, 2017, 08:30:04 »
Thanks guys. I am pretty excited. This will be my first bike build, I've built a few cars in my day but nothing like this. Always wanted too so it should be fun.

I am not sure on the seat. I got another one on the way as the fiberglass on this is in pretty rough shape, I do like the lines but when I rode it that was the biggest issue with movement. It's been pretty much trashed with 4-5 attempts at mounting so it may not be salvageable.

On a business trip in Atlanta but parts keep showing at my door so here is to this weekend and more progress!

Offline Cody.linhart

  • Posts: 109
Re: 1971 CB750 Cafe Build
« Reply #4 on: Mar 15, 2017, 13:01:23 »
Looking forward to this, are you going to keep the seat, it has nice lines.

I don't know about this swap but sometimes you also have to take the existing stem and press it into the new triple clamps, in addition to the bearing swap.  Others here will know.


I agree, I swapped an R1 onto my 78' 750 without too much hassle. I sent Cognito Moto my lower triple and punched the old stem out, they popped the new one in, put the new bearings on, and that was it! Badabing badaboom


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Offline Carmmont

  • Posts: 4
Re: 1971 CB750 Cafe Build
« Reply #5 on: Mar 15, 2017, 18:59:52 »
Cody, sweet. Good to hear.

So you sent your stock bottom tree to them with the r1 bottom and done?

Just want to make sure I get it. What was the damage?

Offline Carmmont

  • Posts: 4
Re: 1971 CB750 Cafe Build
« Reply #6 on: Mar 16, 2017, 16:03:08 »
Cody, stupid question... can I run the stock tire on the r1? I don't have it yet and I'm trying to determine if I need a new tire/brake setup

Offline Cody.linhart

  • Posts: 109
Re: 1971 CB750 Cafe Build
« Reply #7 on: Mar 16, 2017, 19:12:27 »
I sent you a private message with some info. Let me know what you think!


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Offline willybo

  • Posts: 8
Re: 1971 CB750 Cafe Build
« Reply #8 on: May 11, 2017, 07:49:07 »
Nice bike. Upgrading the exhaust is a good idea also.