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Author Topic: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)  (Read 3026 times)

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Offline Burke

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Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« on: February 07, 2008, 07:51:10 AM »
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=370019486057

What the difference with the Duel Disc and the stock single?
« Last Edit: February 07, 2008, 08:28:45 AM by Burke »
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Offline bryanj

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #1 on: February 07, 2008, 08:49:54 AM »
For the parts shown no difference at all
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Offline Burke

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #2 on: February 07, 2008, 09:30:37 AM »
Quote from: bryanj on February 07, 2008, 08:49:54 AM
For the parts shown no difference at all

Do you mean the part in the pic shows no difference to the stock wheel, or the part numbers?
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Offline Steve F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #3 on: February 07, 2008, 09:35:54 AM »
Ah yes, DUELING discs.  Where's the banjo?
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Offline bryanj

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #4 on: February 07, 2008, 09:53:00 AM »
I mean that there is no difference twin or singlw disc for those parts
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Offline Burke

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #5 on: February 07, 2008, 10:21:06 AM »
So a rims a rim,it just matters how many discs you put on it?
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Offline CrisPDuk

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #6 on: February 07, 2008, 10:31:35 AM »
It's not the rim that matters Burke, it's the hub and the forks that dictate whether or not you can run dual discs.

As Bryan says, with that particular wheel you can use either one or two discs, the only difference is that with dual set-up you would need the extra disc (obviously), plus the fixing bolts that attach the discs to the hub are slightly longer.
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Offline cafe750

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #7 on: February 07, 2008, 08:24:29 PM »
Quote from: Burke on February 07, 2008, 10:21:06 AM
So a rims a rim,it just matters how many discs you put on it?
Yep, bolt the second disc to the wheel, and you have a twin disk wheel...the speedo drive is the fun part... :)
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Offline Jim F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #8 on: February 07, 2008, 09:15:12 PM »
how about duel disks and 2 sets of calipers

talkin about stoppin power

lol

Big-Jim
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Offline CrisPDuk

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #9 on: February 08, 2008, 02:10:05 AM »
 :o :o :o

But surely that would only work if the six pots were actually attached to the bike though Jim ;)
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Offline Jim F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #10 on: February 08, 2008, 07:19:03 AM »
Your no fun Chris
your not supose to notice these things

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Offline Jim F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #11 on: February 08, 2008, 01:57:19 PM »
Progress with the 6 pot calipers today

I machined the backs of the calipers to clear the spokes

and know its just a matter of a caliper bracket and will be done

i will post some pictures as this takes place

should have scary brakes then

Jim
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Offline cben750f0

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #12 on: February 08, 2008, 02:11:05 PM »
REGARDING THE SPEEDO DRIVE, JUST USE ONE OUT OF A 500/550... THEY WILL FIT INTO THE CENTRE ONT HE SECOND DISC.... EASY...

PEACE

ps sorry for the caps lock!!!lol
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Offline Terry in Australia

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #13 on: February 08, 2008, 03:28:41 PM »
Quote from: big-jim on February 08, 2008, 01:57:19 PM
Progress with the 6 pot calipers today

I machined the backs of the calipers to clear the spokes

and know its just a matter of a caliper bracket and will be done

i will post some pictures as this takes place

should have scary brakes then

Jim

So you're really gonna do it Jim? Woohoo! Er, what MC are you gonna use? I think the OEM Honda 750 item would be kind of disappointing..............  ;D
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Offline bryanj

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #14 on: February 08, 2008, 11:04:27 PM »
cben, no they wont 500/550 and 750 are all the same part!!!
The one you need is the VERY early 750 whichaint made now
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Offline cben750f0

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #15 on: February 09, 2008, 10:32:39 AM »
dam, i must have been ultra lucky then, cos i bought mine off ebay and it was sold as a 500/550 drive, which had no tabs on it.... i will need to go ad change the dual disc doco i did then.... thnks for the info.... i honestly thought it was the smaller bikes drive...


peace
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Offline Gregorymoto

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #16 on: February 09, 2008, 02:45:07 PM »
Hay big JIM, are you using the stock rotor.
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Offline Jim F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #17 on: February 09, 2008, 06:16:21 PM »
will either  use Brembo 320mm full floaters  or Honda CBR600 rotors
i have both sets and I will have to see whats gong to work
best. I hope the 320s will work
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Offline Jim F

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #18 on: February 09, 2008, 06:17:44 PM »
Quote from: Terry in Australia on February 08, 2008, 03:28:41 PM
Quote from: big-jim on February 08, 2008, 01:57:19 PM
Progress with the 6 pot calipers today

I machined the backs of the calipers to clear the spokes

and know its just a matter of a caliper bracket and will be done

i will post some pictures as this takes place

should have scary brakes then

320mm  Brembos :))))

Jim

So you're really gonna do it Jim? Woohoo! Er, what MC are you gonna use? I think the OEM Honda 750 item would be kind of disappointing..............  ;D
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tbone

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #19 on: February 09, 2008, 06:51:36 PM »
Quote from: bryanj on February 08, 2008, 11:04:27 PM
The one you need is the VERY early 750 whichaint made now

According to my old parts manuals and the micro fiche online the
box assy. never changed on the 750K's from 1969 thru 1978
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Offline Ricky_Racer

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #20 on: February 09, 2008, 07:04:58 PM »
Yep, you're correct, tbone, and the many webdocs that have been posted regarding using 500/550 speedos as a solution are, IMHO, incorrect.  The difference is the very early drive flange without the tabs, and the matching totally flat flange cover.  Both parts are NLA.  The option is to modify the later drive flange so it engages the hub flats, or hope you can find an early drive flange, or run without a standard speedo.  RR
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Offline seaweb11

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #21 on: February 11, 2008, 02:20:24 PM »
Thought I would try and piggy back on this thread for my ( duel rotor / speedo ) question on my Tracy build Thread.  If anyone can help that would be great.

http://forums.sohc4.net/index.php?topic=17831.270
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Offline bryanj

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #22 on: February 12, 2008, 04:49:15 AM »
Its not the speedo box its the drive plate, called by Honda "Retainer, gear Box"

Original CB 750 44641-300-000 This has two bent over tabs that engage on the two flats of the protruding part of hub, but on the original wheel it moved a bit radially and allowed the speedo needle to "bounce" so it got modified to:-

44641-341-000  from frame number 1058490 This has the two large flat tabs located under "bumps" on the chrome trim.

Original 500 44641-300-020 Is ecactly the same as:-
Later 500/550 44641-341-000.

I know this for certain as the original front wheel on number 36 500 had the tabs and back in 75, when duelling a 750, the shop i worked for struggled to get the early plate but managed in the end but when I did my 500 in 76 i had to modify the original.

Finally there was a man in Canada, sorry cant remember the name and lost the contact long ago in a disc crash, who had several of the early part bought in a clearance from somewhere BUT he wanted $45 ish US plus shipping for them EACH
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Offline bryanj

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Re: Front Duel Disc Rim Vs. Single Disc Rim (is this a duel Disc Rim?)
« Reply #23 on: February 12, 2008, 05:00:49 AM »
As a follow up I have just been playing on Motogrid's site and the Early drive plate was also fitted to CB450K3.
It may well be that the part listed as "500" was on a 500 but was  a 450 wheel
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!
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