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Author Topic: dual disc conversion .  (Read 5445 times)

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Offline puppytrax

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Re: dual disc conversion .
« Reply #25 on: October 20, 2006, 06:05:20 PM »
...Woo-eee...My ass is dragging...    ::)

I been modifying that solid speedo drive plate for over four hours...I can tell you right now, it is better to be a bit too loose than .020" too tight...  >:(

I got a nice snug fit, it looks OK, but the new hub engagement tang on one side is just a bit too close...it's pulling the center part with the two cutouts off center and binding the drive...I think I'll have to heat it up and stretch it a bit...

Otherwise it all fits and works wonderfully...    :P
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Offline bryanj

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Re: dual disc conversion .
« Reply #26 on: October 21, 2006, 03:10:04 AM »
Well done with the mod, as you found it aint that difficult to do , but a #$%* to describe! As to the "bonded" drives, all i can think is that they are from a later bike (after 82) as i never seen one like it
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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!

Offline puppytrax

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Re: dual disc conversion .
« Reply #27 on: October 21, 2006, 07:24:42 AM »
I thought I'd post these pics here as well...since not all wheels are the same...the hub without flats would probably be a better conversion if the rotor had the speedo drive reliefs ground/milled into it...

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Offline puppytrax

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Re: dual disc conversion .
« Reply #28 on: October 21, 2006, 07:29:07 AM »
I also found that a 750 (?) rotor will work on a 500/550, even though the 750 measures ~11 5/8" and the 500/550 is ~10 7/8"...the other specs are the same, so it just needs to be turned down to the 500/550 diameter...this could be important if you can't find a good 500/550 rotor (but do find a 750 in good shape)...   ;)

BTW: The steel in the outer part of the riveted Honda rotor is harder than Hell!!!   :o
« Last Edit: October 21, 2006, 08:29:56 AM by puppytrax »
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Offline bwaller

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Re: dual disc conversion .
« Reply #29 on: October 21, 2006, 08:06:25 AM »
Yes that is a big chunk of stainless, turning those things in a lathe is tough especially when the steel has been well heated. If it's yellowed or blued they sometimes vibrate when turning although some guys have done it.
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Offline puppytrax

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Re: dual disc conversion .
« Reply #30 on: October 21, 2006, 08:21:21 AM »
Yes, I used carbide bits and slow speed; still had to take very small cuts...

mcpuffett -

Thia is my finished and fitted (but not yet painted) drive plate -

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Offline puppytrax

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Re: dual disc conversion .
« Reply #31 on: October 21, 2006, 08:22:26 AM »
...and the plate on the hub...

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Offline puppytrax

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Re: dual disc conversion .
« Reply #32 on: October 21, 2006, 08:23:43 AM »
...and the assembly mounted with axle...(still unpainted)...

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Offline puppytrax

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Re: dual disc conversion .
« Reply #33 on: October 21, 2006, 08:28:15 AM »
mcpuffett/other interested parties...

My speedo drive now needs to be assembled more carefully than before; not sure why, but if it is even a teeny tiny bit off, the ears won't engage correctly and it binds...I fould it best to assemble the modified plate to the speedo gearbox and then fit it on the hub and lock it in place with the axle...

Again, thanks to all concerned for their help!!!   ;) ;D
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Offline bwaller

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Re: dual disc conversion .
« Reply #34 on: October 21, 2006, 11:10:08 AM »
I find it's better that the drive has a little slack where the ears mate with the hub so when the axle is installed everything can center and not bind.
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Offline puppytrax

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Re: dual disc conversion .
« Reply #35 on: October 21, 2006, 05:08:43 PM »
What have you guys done/plan on doing with that shark-fin water diffuser?? Leave it off, or will a 2nd one mount OK on the 2nd disk??   ???
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Offline bwaller

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Re: dual disc conversion .
« Reply #36 on: October 21, 2006, 05:47:36 PM »
I mounted the calipers behind the legs and didn't use them.
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steveko

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Re: dual disc conversion .
« Reply #37 on: October 22, 2006, 12:15:37 AM »
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Offline bryanj

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Re: dual disc conversion .
« Reply #38 on: October 22, 2006, 03:45:06 AM »
Puppytrax, that hub with no flats is interesting--never seen one of those either! Did it have the "bonded" drive on it? Is it wing? multidudinous other questions i will think of later
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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!

Offline puppytrax

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Re: dual disc conversion .
« Reply #39 on: October 22, 2006, 06:39:09 AM »
Quote from: bryanj on October 22, 2006, 03:45:06 AM
Puppytrax, that hub with no flats is interesting--never seen one of those either! Did it have the "bonded" drive on it?

Yup; that's the one...bonded drive + no flats...

Quote
Is it wing?

I dunno...What's a "wing"??   ???

IIRC, this came off the 76 CB550 parts bike...
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Offline bryanj

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Re: dual disc conversion .
« Reply #40 on: October 22, 2006, 06:50:56 AM »
"wing" as in Goldwing, otherwise known as a brass foot cos its big heavy and cumbersome! The 76 550K never came to UK and the 77/78 K3 i never took a front end out of, except for tyre and i didnt take the spindle out to do them as we didnt have machines then!---time was bonus money!!
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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!

Offline mcpuffett

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Re: dual disc conversion .
« Reply #41 on: October 22, 2006, 06:55:30 AM »
wow puppytrax, you have been busy  8) i now have a very good idea what i am doing , i just need to find a decent caliper then i will have all the bits , thanks for everyones input you all have been very helpful  8),     mick.
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Honda CB750 KO 1970,   Honda VTX 1300 2006, Lancaster England.

Offline puppytrax

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Re: dual disc conversion .
« Reply #42 on: October 22, 2006, 06:58:43 AM »
Quote from: bryanj on October 22, 2006, 06:50:56 AM
"wing" as in Goldwing, otherwise known as a brass foot cos its big heavy and cumbersome! The 76 550K never came to UK...

...LOL...Yes, the 76 was a "K" model...at least it had the "K" pipes & gas tank on it...  ;D
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