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Author Topic: CB550 Rear disc conversion  (Read 6429 times)

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Offline Jonny Rock-it

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CB550 Rear disc conversion
« on: August 16, 2012, 08:13:03 PM »
So I saw a video on youtube where a guy used a 750 hub and disc for a rear disc conversion on a 550 and I started wondering if a 750 front hub will fit a 550 rear axle without any mods?
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Offline dave500

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Re: CB550 Rear disc conversion
« Reply #1 on: August 17, 2012, 12:10:34 AM »
how will the drive sprocket bolt on?the 500/550 and 750 share the same front hub.
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Offline fastbroshi

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Re: CB550 Rear disc conversion
« Reply #2 on: August 17, 2012, 02:36:32 AM »
I think the easy way to approach it would be to just grab the whole rear end off of a 750F.  Slightly longer swingarm but the pivot point width on the 750 arm should be real close to the 550.  Might have to shim out/in the sprockets.
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Offline fishhead

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Re: CB550 Rear disc conversion
« Reply #3 on: August 17, 2012, 04:03:03 AM »
Using a front wheel for the rear is not easily done. A mill and a lathe help alot.
 Using a 750 disc/rear wheel and swingarm would get you more than halfway there.

Pics are a 750 front wheel converted to rear wheel use on a 750. Bearings needed to be changed to 20mm, adapters needed for sprocket and disc, new axle spacers needed, caliper mount made,etc...





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Offline dave500

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Re: CB550 Rear disc conversion
« Reply #4 on: August 17, 2012, 04:09:32 AM »
so?,no damper drive?
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Offline fishhead

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Re: CB550 Rear disc conversion
« Reply #5 on: August 17, 2012, 04:12:45 AM »
Quote from: dave500 on August 17, 2012, 04:09:32 AM
so?,no damper drive?
Nope.
 This wheel replaced a Shelby-Dowd wheel that also didnt have a cush drive.
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Offline voxonda

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Re: CB550 Rear disc conversion
« Reply #6 on: August 17, 2012, 04:38:20 AM »
Quote from: dave500 on August 17, 2012, 04:09:32 AM
so?,no damper drive?

The one I am building, and have build before, do have a damper drive. But like fishhead says it involves some work.

Rob
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Offline MCRider

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Re: CB550 Rear disc conversion
« Reply #7 on: August 17, 2012, 07:26:57 AM »
Quote from: fishhead on August 17, 2012, 04:12:45 AM
Quote from: dave500 on August 17, 2012, 04:09:32 AM
so?,no damper drive?
Nope.
 This wheel replaced a Shelby-Dowd wheel that also didnt have a cush drive.
Wow that's cool! What size rim? 

You and I are going to have to deal on something someday. Your stuff is too cool.  Maybe a 4 piston caliper setup for a 75F?

Anyway, for those watching, that's a cross 2, ALL INSIDE spoke pattern.

Where'd you get the spokes?
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Offline fishhead

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Re: CB550 Rear disc conversion
« Reply #8 on: August 18, 2012, 04:32:16 AM »
The rim is 18 X 2.5.

  I believe the spokes are heavy gauge front CB/GL that were cut down and rethreaded (with a proper thread roller). I used inner lacing because it lined up best with the rim holes.
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Offline FunJimmy

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Re: CB550 Rear disc conversion
« Reply #9 on: August 18, 2012, 09:40:30 AM »
Very nice.
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Offline Peekster

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Re: CB550 Rear disc conversion
« Reply #10 on: April 16, 2019, 05:33:50 PM »
IM looking to do a rear disc conversion on my 74 CB550, exactly how well will a CB750 rear swing arm fit. im not worried about length ill factor it in when I chop the frame to hoop it.
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Offline Bankerdanny

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Re: CB550 Rear disc conversion
« Reply #11 on: April 17, 2019, 08:04:04 AM »
The width of the pivot is the same, so it should bolt up fine.
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Offline bryanj

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Re: CB550 Rear disc conversion
« Reply #12 on: April 17, 2019, 09:28:16 AM »
May be too wide to fit inbetween pillion loops
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Offline Gurp

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Re: CB550 Rear disc conversion
« Reply #13 on: April 17, 2019, 09:43:44 AM »
Following
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Offline Peekster

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Re: CB550 Rear disc conversion
« Reply #14 on: April 18, 2019, 07:42:15 PM »
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