The International CBX Owners Association

Hello CBXers,

I have a '79 CB1, and notice a metallic sound noise on the left side cylinderhead. Sounds like loud valve clicking. Depends a little of temperature. Specialle when engine is cold or very hot. Valve clearings, cam and chain are ok. Y have already changed the cam couplers/conectors.

Has anyone an idea or experience with this special problem ?

Maybe cam bearing, spring, valve-seat ??

Thanks for your opinion !

Werner, Munich, Germany

Oldham couplers,replace with cbxbilly's after market UK

Hallo Werner:



Bist Du sicher da? es nicht von der Lima kommt?

Hello and thanks for your opinions !

What is the website of CBX Billy ?

I would like to check that.

But I have doubt, that the olfham couplers is the problem. The parts I

already changed, were Honda genuine parts. Maybe they are less good,

but they fitted well, without significant clearance. (nearly zero)



to the other (german) reply:

No, its not the generator. The noise remains to the cyl.-head.

(but I never have checked the generator-bearing, I never recognized

the known problem...)



By the way, some people on cbx meetings didn't have ideas, too.



Werner

The Honda replacements have the same problem as the originals,the aftermarket are slightly larger and are a pressure fit (put them in the freezer for a couple of days).Go to Tims Bulletin Board and ask for cbxbill to get in touch for oldham couplers or ask on the UC Davis CBX list.if you need these sites email me direct at cbxxx@webtv.net and I'll send them to you.

Not the alternator, valves adjusted, cam chain O.K., you may have named the culprit, Ripper . I installed a set of oversized Oldham couplers on my 79 CBX and they did make a difference. :)

Werner,

Have any of your cam caps loosened? Check all the bolts for loosening or breakage,this will set up a hideous racket on top if so.

Go to TIMS BBS now,JCBX is advertising oversize Oldhams now!

Have you checked the praggle shaft? It had me stumped when I first got my CBX.

Abdy: what did you do with the praggle shaft?

Just needed the carbon blown out

Andy:



Did you have to re-adjust the piston return springs? And how about the double-clutch retainer?

Hello all,

thanks for your replies,



(the cam holders are fastend. I had to get out the cams before to fix a loosen cyl main bolt in the crankshaft case.

The rare sound was before and after this repair.

While fixing that, I replaced the couplers (genuine), but no difference..)



It really sounds like loud valve noise. "click click click..."

Best to hear when idling.

Its not so problematic, but we all like 6 cylinders running like a "swiss clock"...



So, its seems that I should check the couplers one more time...



Thanks for all replies

Werner

praggle shaft, piston return springs, indeed!



My other bike is a 100" V twin (I know, I know) that I'm building. My wife walks out into the garage the other day as I'm fussing and fuming over the primary drive setup (yes, it's non-unit construction) {THE ENGLISH GAVE UP ON NON UNIT in the SEVENTIES for crying out loud} and trying to figure out the 'starter jackshaft' (their name for the starter bendix affair) and I'm mumbling about the fac that I'm building a bike which will be registered as a 2003 but built on 1903 technology.



Understand that this is my first non-metric scooter. While it's been a few years since I've owned and ridden a street bike (say 1975 or so) I decided to get back into bikes when I got bored with the street rods I was into for a number of years. I figured I might as well build a large displacement V twin on accounta it's gonna be fun. Not loud, just fun.



At any rate, the praggle shaft deal reminded me of a Road and Track article from years gone by that called out a reason for an F1 car exiting a given race. Whilst I don't remember the marque or the race I do remember the 'cause'.



Dead Framastat.



Apparently they (R&T) didn't really know the cause for the endit of the machinenenen so they went with the framastat becoming decesed.



I do love it so.



Jim

What do you mean "...gave up on the non unit"? Once you achieve perfection you've nothing left but to move on to something else. :)