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Flaking Rockers, the 4 stages of grief

Started by Speeddog, February 27, 2010, 11:41:13 AM

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Speeddog

February 27, 2010, 11:41:13 AM


Lower Left: OK, what you see there disappears with a little scotchbrite.

Lower Right: Looking borderline, visible 'depth' of wear at top and bottom of the contact patch.

Upper Left: Chrome completely gone in 2/3 of the contact patch.

Upper Right: Chrome completely gone from the entire contact patch.


- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducpainter

#1
February 27, 2010, 11:44:24 AM
So...

it needs 3.

Those are pretty old I think.

The earlier bad ones had that bronze color.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Speeddog

#2
February 27, 2010, 11:55:26 AM
AFAIK, they're the originals on an '02 S4.

But the bike is on owner #3, so not a 'for sure'.

All from the horizontal, verticals were fine.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducpainter

#3
February 27, 2010, 11:56:57 AM
Quote from: Speeddog on February 27, 2010, 11:55:26 AM
AFAIK, they're the originals on an '02 S4.

But the bike is on owner #3, so not a 'for sure'.

All from the horizontal, verticals were fine.
Are yours the same color?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


gage

#4
February 27, 2010, 06:45:14 PM
has anyone used the DLC coated replacement rockers for few thousand miles yet...

ducpainter

#5
February 27, 2010, 06:46:22 PM
not me.

I would though.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


uclabiker06

#6
February 27, 2010, 07:59:50 PM
Wow thats harsh.
Life is never ours to keep, we borrow it and then we have to give it back.
2006 S2R
2009 Smart

Langanobob

#7
February 27, 2010, 10:42:52 PM
Any way to replate them, or are new ones the only option?  As I recall, that kind of hard chrome is not the same process as say '57 Chevy bumpers, but I don't know what the difference is. 

Howie

#8
February 28, 2010, 12:39:46 AM
A company called Megacycle (you may know them since they do a lot of old British stuff) used to re manufacture Ducati rockers, they may still do this, but Ducati rockers are no longer in the catalog.  If I remember correctly, they used to nitride them instead of chroming.  Megacycle does re chrome other brand rockers.  They grind them down, weld on new material , machine to specs, then chrome.  Allegedly the problem with Ducati rockers was a defect in manufacturing , hydrogen embrittlement.  Improper cooling of the rocker would make the chrome brittle, causing the flaking problem.

http://www.megacyclecams.com/

jerryz

#9
February 28, 2010, 03:13:32 AM
NICHOLS IN SF have megacycle rockers

ducpainter

#10
February 28, 2010, 03:31:31 AM
Quote from: howie on February 28, 2010, 12:39:46 AM
A company called Megacycle (you may know them since they do a lot of old British stuff) used to re manufacture Ducati rockers, they may still do this, but Ducati rockers are no longer in the catalog.  If I remember correctly, they used to nitride them instead of chroming.  Megacycle does re chrome other brand rockers.  They grind them down, weld on new material , machine to specs, then chrome.  Allegedly the problem with Ducati rockers was a defect in manufacturing , hydrogen embrittlement.  Improper cooling of the rocker would make the chrome brittle, causing the flaking problem.

http://www.megacyclecams.com/
The 4V rockers are in there you just need to dig.

The price in the 08 catalog is $89. They do not re-chrome the rockers. They grind and hard face the valve end.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Speeddog

#11
February 28, 2010, 09:25:29 AM
Quote from: ducpainter on February 27, 2010, 11:56:57 AM
Are yours the same color?

Not sure, as I don't have 'em out right now, but I think so.

I've had rockers re-done by Megacycle; it's a grind chrome off, hard weld, and regrind process.

New OEM ones are supposed to be better.

I've not heard much about the DLC coated rockers.
Hopefully it's a little bit cheaper than the fork leg DLC coating I checked on a while back.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducpainter

#12
February 28, 2010, 11:00:11 AM
Bruce had some done and Eric has installed some of them.

The cost was somewhat reasonable, but depended on the number being done...more #s lower per piece cost.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Desmo Demon

#13
February 28, 2010, 11:06:21 AM
I replaced four rockers in my 748 in 2006 with OEM rockers (when they were $45 each) with only 5600 miles on the bike. At 12k, they were still all fine. At 18k, some more were bad, including one of the 2006 replacement rockers, and I replaced all the openers with Megacycled rockers that I got through Nichol's. 1300 miles later, I wrecked the bike and am still in the process of repairing it (I have to get some more use out of those rockers, right?  ;) )

For color contrast of OEM rockers, here is a picture I took back in 2006 showing a 1998, 2002, and 2006 OEM rockers...



(The 1998 rockers is actually a light gold color)

Places I've been on two wheels:

IBA #32735

gage

#14
March 05, 2010, 05:54:37 PM
Quote from: ducpainter on February 28, 2010, 11:00:11 AM
Bruce had some done and Eric has installed some of them.

The cost was somewhat reasonable, but depended on the number being done...more #s lower per piece cost.

The DLC ones are definately cool looking - I'd try them just because of that but thankfully I haven't had a need
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