Author Topic: 550 clutch Replacement  (Read 2380 times)

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Offline Brentadour

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550 clutch Replacement
« on: April 02, 2005, 07:23:39 PM »
Typical slipping old clutch. Where can I get an upgrade for the stock clutch and springs.

-Brent
1976 CB550 Stockie
1977 CB550 Cafe Racer

Offline fergie

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Re: 550 clutch Replacement
« Reply #1 on: April 03, 2005, 09:08:25 AM »
I think there's a barnett on ebay right now.
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Offline fergie

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Re: 550 clutch Replacement
« Reply #2 on: April 03, 2005, 09:24:28 AM »
sorry brent I can,I can't seem to find it there now.it must have ended already.Ive seen them there on a regular basis though. If you can't find on on ebay your local dealer should carry Barrnett clutches.
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motosd

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Re: 550 clutch Replacement
« Reply #3 on: January 21, 2006, 04:17:25 PM »
i purchased clutch friction plates online from
www.classiccycleparts.com

They were only about $30 for all 7.  My local honda dealer wanted like $13 each and didn't have a "kit".

I don't know how often these really need replaced.  My bike has 88000 miles on it, and the old plates actually looked pretty good, but the previous owner complained of some kind of "slippage" when the bike gets hot, which I haven't experienced.  I actually replaced the clutch plates whlie the bike was down waiting for other parts, and it needed an oil change, so seemed like a good time to do it.

Got them in about 4 days, USPS, which I like better than UPS because they leave packages at my door, UPS won't.

The install was relatively easy, except I took off the nut on the front of clutch cover, wasn't necessary.  just undo the phillips head screws that are around the outside of the clutch cover only.  You also have to take off the kickstarter and the rear brake.  You do not need to take off the peg.

This other nut is actually part of the  internal clutch lever, i don't know the proper name for it, if you flip the cover over after you take the cover off, you can see the lever mechanism.  Mine came apart while I was taking it the cover off, because i took off the outside "mystery" nut, and the manual didn't have a photo, so make sure if it comes apart, you get the spring load to work right before you put the cover back on.  I recommend double-checking this thing anyway, the little 'cam' at the top can flip out pretty easily too.  I remember hearing it "pop" early on and thought, what the hell was that? Luckily, I took a good luck at the mechanism and saw what I'd done.   If the cam comes out from under the lever, you will need to undo that front "mystery" nut now, slide the lever over the cam and under the spring, then rebolt the pivot at the bottom (the "mystery" nut).  On my bike, there was a notch where the clutch cable connects and the clutch cover, that's where everything should line up when you're not pulling on the clutch lever.

Watch the small brake pedal return spring when putting the brake pedal back on.  It's a little tiny one by the frame.  There's a big spring on the pedal itself, I used a big flathead screwdriver to remove and install it without too much trouble.

So don't just check your clutch before heading out, check the rear brake too.

The cable seemed extra tight after i replaced the plates, I had to let it all the way out on both ends.   This kind of surprised me, because I didn't think there was that much wear on the old plates, but maybe there was.  Or maybe the clutch assembly needs to settle back in.  I've only ridden a few miles since then, so I'll keep checking the cable and post again if I notice it needs adjusted already.

I have a Clymer manual and I'm not really happy with it.  I expected there to be at least some torque spec's on the clutch spring bolts, but there were not.  I forgot to buy the clutch springs which was kind of stupid on my part.   The next time I do an oil change, I'll go back in and put new springs in too.  The bolts holding the clutch springs in was "pretty tight" when I took them off, so I just put them back "pretty tight" but not really happy with that.  I would rather have torque spec's on internal bolts like that that I can't get to without dropping fluids, etc. 

I'll search for torque spec's on here.  Or if someone knows a better repair manual, please post.

I don't check this site often, so email me if you need to share critical information, motosd@cox.net.  thanks!

Offline HondaMan

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Re: 550 clutch Replacement
« Reply #4 on: January 23, 2006, 09:44:29 PM »
Look for the clutch plates with straight, blocked edges instead of the slanted ones that came stock. Then, if you have a high-output motor, use the Barnett springs, otherwise use the Honda springs with one extra washer on each spring for preload. Be ABSOLUTELY SURE that you check the steel plates for flatness, or replace them all, in set.

The Barnett will be "grabby" and will wear out much sooner than the Honda plates, and it will warp the steel plates after about 10k miles.
See SOHC4shop.com for info about the gadgets I make for these bikes.

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Offline Bodi

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Re: 550 clutch Replacement
« Reply #5 on: January 23, 2006, 10:08:06 PM »
Barnett will not slip with highly modified engines, but they wear very fast. Also they really stick when parked, like almost welded together. Starting out in the morning gets interesting... sometimes spirited kickstart jumping with the clutch pulled in will free the clutch, sometimes kicking it into gear will only shoot you forward a few feet (sometimes lots more).
Good "standard" friction plates, flat steel plates, and stronger springs (if it slips with good stock springs) should manage any stock to streetable hotrodded engine's power.
Checking the steel plates is easy, clean them off and put 2 together. Rotate one 90 degrees. Flip one over. Rotate one again. If the two fit against one another with no gaps (rocking action or evidence of cupping) in all positions they are OK. Check them all.

Offline n9viw

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Re: 550 clutch Replacement
« Reply #6 on: January 24, 2006, 11:52:37 AM »
In response to the query for a better repair manual, head over to http://www.honda4fun.com/man_officina/man_officina.html . He has a scan for the 500/550 FSM that I printed out and put in slipcovers- absolutely indispensable! Some of the pics are a little grainy, but you take what you can get, and that one's from the factory!
Nick

'76 Honda CB550k
'73 Honda CB750k