Author Topic: CBX550 info & issues  (Read 263 times)

Offline Laverda120

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CBX550 info & issues
« on: September 16, 2019, 09:24:54 AM »
Good Morning All.
I'm currently following a CBX550 on ebay that is currently in a collection.
I always liked these bikes and nearly bought one when I was much, much younger but in the end I stuck with my 400/4.
The main reason I didn't buy one back in the day was because of the bad press they received within months of being launched due to the cam chain woes and the dreaded inboard discs.
Can anyone offer any advice regarding the cam chain issues? From what I remember it was to do with the tensioner, did Honda recall the bikes to undertake a mod? If they did is there anyway of telling if the mod was undertaken such as centre punch marks as the CX500`s? When does the cam chain start giving problems, early on or after a few thousand miles and is there a retro mod available, was the tensioner part superceded by Honda later on in the production run?
Are the inboard ventilated discs really as bad as people say, does it take two hours to get the front wheel out and back in with major loss of skin, knuckles and temper?
I can't really find anything about the technical issues on these engines, only road tests and my memory when they were new.
Personally I think they are really smart looking bikes especially in F2 format with the fairing.
Any advice appreciated.
Cheers
Dave
1976 Honda 400/4
1977 Honda 400/4
1981 Honda CB250RSA
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1982 Laverda 120 Jota
1924 Triumph 550SD
2012 Stanley Battery Drill

Online Bryanj

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Re: CBX550 info & issues
« Reply #1 on: September 16, 2019, 10:57:36 AM »
Cam chains just need proper adjustment, inboard discs are an aquired knack----take pics of how they are assembled!!!! I have heard of starter extended shafts giving problems and they have the alternator brushes like cbx1000 and dohc which can give problems. If you get it search for a proper Honda blue book manual fror real information not haynes.
Bodywork very difficult to get, i managed to locate a new sidepanel in Australia!
I sold one last year just after my hospital stay full mot, new(honda) fork seals, motad+spare Netto and spare forks in blue/white with fairing for £1995

Online Bryanj

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Re: CBX550 info & issues
« Reply #2 on: September 16, 2019, 12:45:06 PM »
If its the one at £1000 with the fairing "to go with it" make sure the fairing framework is with it

Offline K2-K6

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Re: CBX550 info & issues
« Reply #3 on: September 16, 2019, 12:56:05 PM »
http://www.manualedereparatie.info/en/download/honda-cbx-400-f-550-f-Service-manual.html

Edit #1
Haven't had time to watch it through yet https://m.youtube.com/watch?v=XHx2eH3byis

Edit #2
http://www.angelfire.com/ca/DrOhm/cbx550f.html

Difficult to find info on this engine but some kind soul's have been generous enough to share.

Edit#3
https://www.motorradonline.de/klassiker/auf-achse-mit-der-honda-cbx-550-f2-ausfahrt-mit-dem-honda-klassiker/

This last one is worth reading after translate for some of the best description I've read of a bike ;D
« Last Edit: September 16, 2019, 01:57:20 PM by K2-K6 »

Offline K2-K6

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Re: CBX550 info & issues
« Reply #4 on: September 16, 2019, 02:01:46 PM »
And it gives you:-

 After a short gear shift, the first one snaps, the smooth and sensitive clutch creates the adhesion, dry twice quilted, hoarsely purrs the Honda CBX 550 from the residential area. Very tame, suddenly. The Honda people were not able to conjure up either: their engine goes well just over 1,000 tours to the gas, takes the 25-mm Keihin Gleichdruckvergasern without a swallows their mixture, but developed under 3,500 revolutions only delicate forward thrust. It follows a very civilized work area, up to almost 7,000 / min, which fits all the everyday needs.

Absolutely superb  ;D

Offline MCTID

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Re: CBX550 info & issues
« Reply #5 on: September 16, 2019, 07:26:24 PM »
A Classic wordsmith indeed. Makes you proud to own a Honda ! 

Quote: 'takes the 25-mm Keihin Gleichdruckvergasern without a swill their mixture, develops under 3.500 revolutions only tender Vorwärtsdrang'.

That reviewer must now have a job at that big shiny palace where the sprouts are processed ! LOL.
Now: CB750K4. 1970 Bonneville. Various other 1960's 650 Triumph T120's/ TR6's/ TR6C's. Previous: CB1300 (2). ZXR1200S. VFR800. CB750 Nighthawk. CX500. XS500 Yam. Suzuki GT500. BSA A10. Various Lambrettas. Zunddap Bella (honest).

Offline mike the bike

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Re: CBX550 info & issues
« Reply #6 on: September 16, 2019, 09:07:37 PM »
More Engrish..
If at first you don't succeed, skydiving is not for you.

Offline Oddjob

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Re: CBX550 info & issues
« Reply #7 on: September 16, 2019, 09:45:06 PM »
There is a definite knack to getting the front wheel out without scratching the gunmetal finish on the brakes.

I managed to find a way of doing it and out of 10 mechanics at our place I was the only one who could do it, I can still remember some of it even today and could probably remember the rest if I had one in my hands again. All I can remember is to remove the outer shrouds of the onboard discs, there were 3 bolts holding them on IIRC, pass them up the brake lines until they can be hung off the front indicators, can't remember if this involved removing the front mudguard. The other trick I can remember is getting the bleed nipple to sit up hard against the fork slider, think it was the front of the slider not the back, when it was in that position you could slide the wheel forward and it would just pop out lovely, as the wheel moved the bleed nipple would rotate away from the fork slider. Why it worked I can't say without working on one again but it certainly worked very well. I could get a wheel out and back in inside 10 mins.
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Offline mike the bike

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Re: CBX550 info & issues
« Reply #8 on: September 16, 2019, 09:49:29 PM »
That's the way I did the brake on the VT250.  3 bolts, then slide the outer ring up the brake line out of the way.
If at first you don't succeed, skydiving is not for you.

Offline K2-K6

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Re: CBX550 info & issues
« Reply #9 on: September 18, 2019, 08:42:08 AM »
Looking further into engine,  it looks like the camchain is not adjusted manually. Seems to use spring loaded guides to work without interference.

They use Hy-vo for both cam and primary drive to clutch hub. Interestingly the gearbox mainshaft is direct drive to output sprocket when in top gear,  meaning they have completely removed the first jackshaft used on earlier small four cylinder Honda.

It's a pedantic view I know,  but chains can't be "tensioned" as such. All you can do is stop them flapping as they wear really, as they lengthen in pitch they reach unserviceable condition when pitch exceeds sprocket dimensions by too much.

Buying one of these it would certainly be wise to hear it running at least.  If it's quiet obviously a reasonable start point,  but reading through other experiences it seems that you'd be wise to eventually consider strip and replacement of rubber components at which point it might as well be chain replacement too. Seems quite a straight forward engine to work on but would need parts cost factored in to overall purchase and ownership.  If it's really good cosmetically and running well (so just refresh of chains and seals needed )  it should make a nice bike longer term.

Online Bryanj

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Re: CBX550 info & issues
« Reply #10 on: September 18, 2019, 11:05:11 AM »
I was told that the hy-vo chains self tension by "walking" up the gears(aks solid sprockets) that they run on

Offline K2-K6

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Re: CBX550 info & issues
« Reply #11 on: September 18, 2019, 07:31:13 PM »
Yes,  I think that's one of the attributes that makes them quiet I believe.

Offline Laverda120

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Re: CBX550 info & issues
« Reply #12 on: September 19, 2019, 06:27:33 PM »
Thanks for all your help and advice everyone. You are right about lack of manual adjustment Nigel and I think that was one of the engines problems, they got noisy.
I have asked the seller about the alternator brushes and the seller advised the charging circuit is 100%.
He also has all the fairing brackets, the bike was originally owned by a Honda mechanic hence the service history. The original owner fitted the fairing from an F2 but the current owner removed it as he didn't like it.
Funnily enough the bike was pulled from ebay with 22 hours to go but no bids? I think a deal was done off line???
1976 Honda 400/4
1977 Honda 400/4
1981 Honda CB250RSA
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1982 Laverda 120 Jota
1924 Triumph 550SD
2012 Stanley Battery Drill