Author Topic: R.C. Eng stamping on alternator  (Read 2388 times)

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Offline Music City Metalcraft

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R.C. Eng stamping on alternator
« on: November 25, 2014, 05:55:16 PM »
While cleaning up parts on my CB750 Dunstall project I noticed a stamped in R.C.Eng letters on the face of the alternator. The part looks like it has been lightened? The crank it's attached to is standard, the engine had some hot rod parts, but standard cc. The bike had a Dunstall kit in the past, as I can see from some rub marks and mods on the frame
Any one know anything about this?.
The part that needs the most upgrading is the nut holding the handlebars

Offline scottly

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Re: R.C. Eng stamping on alternator
« Reply #1 on: November 25, 2014, 06:12:54 PM »
That looks like an early rotor that has had the flange removed. The RC stamp is most likely legitimate, as this was one of the mods he did before Honda switched to the lighter flange-less rotor.
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Offline Retro Rocket

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Re: R.C. Eng stamping on alternator
« Reply #2 on: November 25, 2014, 06:24:51 PM »
That definitely a lightened RC rotor, Its identical to the pics of one in my RC catalog   ;)
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: R.C. Eng stamping on alternator
« Reply #3 on: November 25, 2014, 06:56:27 PM »
Here's a couple pics of a RC rotor vs a stock later rotor







As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline MRieck

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Re: R.C. Eng stamping on alternator
« Reply #4 on: November 25, 2014, 07:12:30 PM »
That first one will still charge and use the electric start brother. That one your showing is basically vestigial. ;) It may charge a little. ;D......no electric start.
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Offline Big Jay

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Re: R.C. Eng stamping on alternator
« Reply #5 on: November 25, 2014, 07:14:58 PM »
I used to do those, then they came out with the headlights always on, and that was the end of that.

Offline 754

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Re: R.C. Eng stamping on alternator
« Reply #6 on: November 25, 2014, 07:18:30 PM »
The second is fine with kickstart.
Keep an eye out for the collar on the really light ones, it covers the oil hole in crank.
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Offline Music City Metalcraft

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Re: R.C. Eng stamping on alternator
« Reply #7 on: November 26, 2014, 06:15:24 AM »
Thanks guys! I'm a sucker for vintage speed parts, so you can imagine how exited I was when I saw the stamp!Hope it charges OK, otherwise it goes on the shelf.
Retro Rocket, any chance of a picture of that catalogue? :-)
The part that needs the most upgrading is the nut holding the handlebars

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: R.C. Eng stamping on alternator
« Reply #8 on: November 26, 2014, 10:27:03 AM »
Your's will charge just as good as stock. It's only had a very small amount of weight removed as evidenced only by the tapered edges.
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline PeWe

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Re: R.C. Eng stamping on alternator
« Reply #9 on: November 26, 2014, 11:13:43 AM »
My alternator done by my local tuner when they sold RC tuning parts. Charging almost OK with headlight on, >4000 rpms.
NOT RC Alternator.
« Last Edit: November 26, 2014, 02:39:51 PM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Retro Rocket

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Re: R.C. Eng stamping on alternator
« Reply #10 on: November 26, 2014, 01:25:57 PM »
Retro Rocket, any chance of a picture of that catalogue? :-)

You mean the page with the rotor or just a pic of the actual catalog...?  Its 64 pages so i won't be scanning the whole thing... ;D ;)
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline cbr954

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Re: R.C. Eng stamping on alternator
« Reply #11 on: November 26, 2014, 03:56:18 PM »
One on the left was done by Cycle X.  Still charges fine.
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Offline Music City Metalcraft

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Re: R.C. Eng stamping on alternator
« Reply #12 on: November 29, 2014, 06:22:37 AM »
Retro Rocket,
as much as you want to scan :-)
I would take the whole catalogue!!!
The part that needs the most upgrading is the nut holding the handlebars

Offline Retro Rocket

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Re: R.C. Eng stamping on alternator
« Reply #13 on: November 29, 2014, 04:16:03 PM »
Retro Rocket,
as much as you want to scan :-)
I would take the whole catalogue!!!

Hahaha, thanks for that.... ;D
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.