Author Topic: CB750 K4 Build - The Cafe Tracer (Read 121187 times)

budman · « **Reply #625 on:** January 07, 2018, 04:53:57 PM »

My wife and I rode down to the Hotel Blessing in Blessing TX today with some friends for lunch. Was overcast but the temperature was good. Nice break from the cold. I rode my bobber and my wife rode the CB750. It was nice to get different perspective of the CB750, but I hope she doesn't start thinking I built it for her.

MauiK3 · « **Reply #626 on:** January 17, 2018, 08:44:34 AM »

I guess if she started to think that way you might just have to agree! You know, happy wife, happy life.
Just build another so we all can follow.

Bankerdanny · « **Reply #627 on:** April 16, 2018, 09:34:36 AM »

Hi Bud,

I don't know if you have seen this picture, I think I posted it in the 2017 Reunion thread, but if not here you go. It's mostly my bike, but I really like your bike and that sleek tail in the foreground.

Danny

budman · « **Reply #628 on:** April 16, 2018, 09:44:25 AM »

Quote from: Bankerdanny on April 16, 2018, 09:34:36 AM

Hi Bud,

I don't know if you have seen this picture, I think I posted it in the 2017 Reunion thread, but if not here you go. It's mostly my bike, but I really like your bike and that sleek tail in the foreground.

Danny

No, I don’t think I saw it. Thanks, Danny. That was a fun day.

I’ll reciprocate.

budman · « **Reply #629 on:** February 23, 2019, 10:56:59 AM »

Been awhile...I still browse the forum as often as I can. Still working on the house. Most of it’s done. I got sick of working on it months ago so when I get the itch to work on my bikes I go ahead and take the time.

This is my latest dream...to have decent brakes on the front of the CB. I got a set of front calipers off of a 1985 magna 700. Been working on the bracket design. Hope to be cutting aluminum next week. We got a CNC mill at work last May that my son and I have been running. We’re getting pretty good at it. Been making a lot of complex fixtures for our parts at work. I figure it’s time to tackle a caliper bracket. I’ll post some progress pics as I go along.

MauiK3 · « **Reply #630 on:** February 24, 2019, 02:48:46 PM »

This should be very interesting
Great to see you back on the forum

knowsnothing · « **Reply #631 on:** February 25, 2019, 06:32:43 AM »

Quote from: budman on February 23, 2019, 10:56:59 AM

Been awhile...I still browse the forum as often as I can. Still working on the house. Most of it’s done. I got sick of working on it months ago so when I get the itch to work on my bikes I go ahead and take the time.

This is my latest dream...to have decent brakes on the front of the CB. I got a set of front calipers off of a 1985 magna 700. Been working on the bracket design. Hope to be cutting aluminum next week. We got a CNC mill at work last May that my son and I have been running. We’re getting pretty good at it. Been making a lot of complex fixtures for our parts at work. I figure it’s time to tackle a caliper bracket. I’ll post some progress pics as I go along.

Awesome! I have been dreaming of doing something like this for awhile, but don't have the cnc mill to make it happen. If you get the bracket figured out and are willing to make an extra i would pay for it.

SOHC4 Cafe Racer Fan · « **Reply #632 on:** February 25, 2019, 01:39:11 PM »

Are you going to mount twin calipers to the single disc (like stunters do with a rear disc)??

budman · « **Reply #633 on:** February 25, 2019, 02:41:29 PM »

Quote from: SOHC4 Cafe Racer Fan on February 25, 2019, 01:39:11 PM

Are you going to mount twin calipers to the single disc (like stunters do with a rear disc)??

I’m not familiar with stunt bike setups. I’ve seen custom choppers that don’t have front brakes, but do have dual calipers on a single disc at the rear.

I think I’m going to make it where I’ll have the option to run two calipers, but I think I’m going to try it with a single caliper first. If it works ok then I can lop off part of the bracket. If it doesn’t work as hoped with a single caliper then I can add the second one.

SOHC4 Cafe Racer Fan · « **Reply #634 on:** February 25, 2019, 03:00:27 PM »

Here's a common set up taken from stunter Aaron Colton's Yamaha FZ-09

754 · « **Reply #635 on:** February 25, 2019, 05:13:44 PM »

Bud, try to use calipers that push from both sides if those dont, then they have to float on pins.
The ones that have pistons moving both sides only have to be parallel to the rotor, and sort of centred.
May as well use a good floater, a lot lighter and most modern calipers use a narrower brake rotor area, not the best for your rotor and they may not handle the thickness.
Ducati and Yamaha floaters should fit your 6 bolt hub you may need need to build a centering ring or one with a bit of offset (spacer) and centering nub..

budman · « **Reply #636 on:** February 25, 2019, 05:16:15 PM »

Quote from: knowsnothing on February 25, 2019, 06:32:43 AM

Awesome! I have been dreaming of doing something like this for awhile, but don't have the cnc mill to make it happen. If you get the bracket figured out and are willing to make an extra i would pay for it.

My work doesn't mind me using the equipment on my own time for personal projects, but I think they would have a problem with me using the equipment and making a profit from it. That's why I have another guy make the clutch lifter plates that I sell.

budman · « **Reply #637 on:** February 25, 2019, 05:25:59 PM »

Quote from: 754 on February 25, 2019, 05:13:44 PM

Bud, try to use calipers that push from both sides if those dont, then they have to float on pins.
The ones that have pistons moving both sides only have to be parallel to the rotor, and sort of centred.
May as well use a good floater, a lot lighter and most modern calipers use a narrower brake rotor area, not the best for your rotor and they may not handle the thickness.
Ducati and Yamaha floaters should fit your 6 bolt hub you may need need to build a centering ring or one with a bit of offset (spacer) and centering nub..

The magna calipers are floaters. There's not a lot of room between the rotor and the spokes for 4 piston fixed calipers with the narrow front end. I've got the OEM left side bracket for the magna calipers so I can see what I need to do to allow the calipers to float. It looks like I'm probably going to have to use a two or three piece bracket setup, depending on whether or not I use one or both calipers. I'm trying to keep the design simple, easy to machine and easy to install, but there's a lot of weird geometry going on. I'll figure it out.

budman · « **Reply #638 on:** February 25, 2019, 05:27:09 PM »

Quote from: SOHC4 Cafe Racer Fan on February 25, 2019, 03:00:27 PM

Here's a common set up taken from stunter Aaron Colton's Yamaha FZ-09

Impressive. I won't be getting that fancy.

754 · « **Reply #639 on:** February 25, 2019, 05:39:39 PM »

Quote from: 754 on February 25, 2019, 05:13:44 PM

Bud, try to use calipers that push from both sides if those dont, then they have to float on pins.
The ones that have pistons moving both sides only have to be parallel to the rotor, and sort of centred.
May as well use a good floater, a lot lighter and most modern calipers use a narrower brake rotor area, not the best for your rotor and they may not handle the thickness.
Ducati and Yamaha floaters should fit your 6 bolt hub you may need need to build a centering ring or one with a bit of offset (spacer) and centering nub..

First pic, a floater Scottly adapted to an F fork.. very easy
2nd pic , single acting Honda 2 piston calipers on F fork with Cb hub.. a bit more work, I have a spare set of brackets and calipers I think.
3rd pic big floater to Yamaha mag 18 inch on Ceriani fork... tricky as we were very pressed for room.
Note. . The Yamaha mags have more clearance than most mags or wire wheels , but hey 6 piston caliper.. Whoo hoooo..

knowsnothing · « **Reply #640 on:** February 26, 2019, 07:42:27 AM »

Quote from: budman on February 25, 2019, 05:16:15 PM

Quote from: knowsnothing on February 25, 2019, 06:32:43 AM

Awesome! I have been dreaming of doing something like this for awhile, but don't have the cnc mill to make it happen. If you get the bracket figured out and are willing to make an extra i would pay for it.

My work doesn't mind me using the equipment on my own time for personal projects, but I think they would have a problem with me using the equipment and making a profit from it. That's why I have another guy make the clutch lifter plates that I sell.

Ah, so the solution is to just sell it to me at cost

I had to try, good luck and I will be watching to see what interesting solution you come up with.

budman · « **Reply #641 on:** March 09, 2019, 06:52:41 AM »

I’m at work today. If all goes according to plan I should walk out of here this afternoon with something like this.

754 · « **Reply #642 on:** March 09, 2019, 08:47:58 AM »

It should work if it's 3 pcs. If the center part is 2 pcs , I would not run it like that.

budman · « **Reply #643 on:** March 09, 2019, 06:16:13 PM »

Three pieces...

Spent all day working on these brackets. I’m happy with the results. I may not even have to do anything with the offset. It looks pretty good at the moment, but I’m a little brain dead right now. I need to get some new brake pads so I can verify whether or not I have enough floating room.

I also need some better looking fasteners, some caliper paint, and a couple of rebuild kits. I’ll probably just polish the brackets.

754 · « **Reply #644 on:** March 10, 2019, 10:10:06 AM »

It looks good.. be sweeter with Button head bolts.
Your adjuster boss, I sometimes have cut them off , as I don't use them.

I think however if it's there, it may look better with a bolt in there, and maybe a sleeve spacer, to cover the threads.
Be easy to mark location with a transfer punch.

budman · « **Reply #645 on:** March 10, 2019, 12:45:58 PM »

I stuck a button head screw in the bung, just like the one in the lower fender mounting holes.

Got new fasteners coming for the bracket to bracket connections.

kmb69 · « **Reply #646 on:** March 10, 2019, 09:16:14 PM »

Looking pretty damn good Bud!

Marco83 · « **Reply #647 on:** March 10, 2019, 09:17:02 PM »

Looking good

Sent from my MIX using Tapatalk

SOHC4 Cafe Racer Fan · « **Reply #648 on:** March 10, 2019, 10:27:01 PM »

Quote from: budman on March 09, 2019, 06:16:13 PM

Impressive! I bet you could sell those!!

budman · « **Reply #649 on:** March 12, 2019, 07:04:03 AM »

Quote from: SOHC4 Cafe Racer Fan on March 10, 2019, 10:27:01 PM

Impressive! I bet you could sell those!!

Thanks. Tried that with the clutch lifter plates and couldn’t sell enough to keep it going. Plus I don’t have a CNC mill I can call my own.

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Author Topic: CB750 K4 Build - The Cafe Tracer (Read 121187 times)