Author Topic: noisy clutch basket on '78 CB750F SuperSport  (Read 1784 times)

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cvs750

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noisy clutch basket on '78 CB750F SuperSport
« on: June 10, 2005, 05:00:00 PM »
Hey all two wheel enthusiasts,,,, I have a 1978 CB750F model that has a rather loud clutch basket with bike in neutral and clutch disengaged. Once i pull in on the clutch lever it smooths out and is quiet. Lately i've noticed that i have more vibration above 60 MPH and a sort of howling noise when i first take her out for a run. I've adjusted the clutch 3 times and it's smooth and does not slip at all. Overall the bike is a very strong runner. Anyone else encountered this type of noisy basket and is there reason to be concerned about this. Thanks and ride safe  ;D

Offline Lumbee

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #1 on: June 10, 2005, 08:30:14 PM »
...sup CVS...I have a 78F also...great running bike...I agree!!!  The clutch side on mine rattles too.  I was told it was nothing to worry about...just loose clutch rings.  As of yet I have not taken an afternoon to pull the clutch side apart and see how things look inside.  I think you can replace those rings, and that my help...I also herad honda put out a bulliten on the problem, so its well known...
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Offline TwoTired

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #2 on: June 10, 2005, 11:06:03 PM »
I have a Honda bulletin in JPEG form that I got from a web site in past years.  It's a 532 K JPEG, so I can't post it here.  It's dated December 8, 1976.  Tittled CB750 Clutch noise Update.  It also says the factory fix was put on engines with numbers higher than :
CB750F E #2557523
CB750 E 2700014

Nice pictures with assembly order and all the part numbers and such.

Seems like it should be in FAQ somewhere but I don't know how to do that.

Where should I send it?
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC

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Offline kghost

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #3 on: June 10, 2005, 11:07:37 PM »
It was on the old Greenspun, Believe its on this one too somewhere.
Stranger in a strange land

Offline bryanj

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #4 on: June 11, 2005, 06:48:15 AM »
As i remember it that mod uses a goldwing steel riveted plate but thats been discontinued unfortunately.
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!

Online MRieck

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #5 on: June 11, 2005, 10:17:16 AM »
Bryan   I was able to order that part about a month ago.
Owner of the "Million Dollar CB"

Offline kghost

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #6 on: June 11, 2005, 11:37:40 AM »
Gold wing Plate still available at my Dealer. Wanted like $60 new.

Also in the later model bikes. My 77 CB750 Supersport had one.

You might just watch E-Bay for a Goldwing or late model clutch pac. They usually go cheap in the $20 range.
Stranger in a strange land

Online MRieck

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #7 on: June 11, 2005, 02:28:15 PM »
...sup CVS...I have a 78F also...great running bike...I agree!!!  The clutch side on mine rattles too.  I was told it was nothing to worry about...just loose clutch rings.  As of yet I have not taken an afternoon to pull the clutch side apart and see how things look inside.  I think you can replace those rings, and that my help...I also herad honda put out a bulliten on the problem, so its well known...
What are you talking about when you say clutch rings- not sure I follow. ???
Owner of the "Million Dollar CB"

Offline Lumbee

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #8 on: June 11, 2005, 05:49:07 PM »
...numbers 4-7...
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Offline Jonesy

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #9 on: June 11, 2005, 07:24:09 PM »
Here's the tech bulletin mentioned in the thread:

http://sohc4.us/files/clutch_rattle.jpg

My 750 does the same thing. As long as I hold the clutch in, she's nice and quiet. Let it out in neutral and she becomes a rattle trap. (I almost can put the Ducati's to shame!)
"Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles; it makes me take another look." -Steve McQueen

Offline kghost

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #10 on: June 12, 2005, 02:43:46 AM »
You could just buy a $1.00 sticker from Barnett. Stick it on the side and everyone will think its normal for your "firebreathing" Machine. ;D ;D
Stranger in a strange land

Offline bryanj

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Re: noisy clutch basket on '78 CB750F SuperSport
« Reply #11 on: June 18, 2005, 08:09:09 AM »
That bulletin is the same one i have, last time i tried to get that plate here in UK (about 2 years ago) it came up discontinued on my dealers price list but didnt go into it any deaper as it was for a paying job and the man expected it cheep.
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!

 

;
Honda