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April 4th, 2005, 08:49 AM   #1
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Rocker Arm Failure

Hello Everyone, I am an infrequent visitor to the site so I'm not up to speed with the latest. At the end of a 100mi ride saturday, I heard some unusual noise from the top end. I haven't gotten into it yet but suspect I've lost the rocker arm needle bearings again. I changed them about 120 hrs back with the larger (03?) update. My bike is an 00 FE400E. I run mobile 1 pure synthetic exclusively. Other than rocker arm bearings, this bike has been bullet proof. I'm a little surprised and disappointed not to have gotten better life out of the larger bearing mod.

My question is, what is the latest update or recommended part #'s for a rocker arm rebuild and where's the best place to order parts these days?

Thanks in advance for any advice.

Husadawg
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April 4th, 2005, 09:38 AM   #2
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I would call Dan Blum at Motoxotica. The part number for the 03 style rocker arm cam follower bearing is 200 324-01.

The 03 style Intake cam follower bearing on my 00 501 went 99 hours before it wore enough to require replacement. The Exhaust bearing is still going strong at 127 hours.

I might also point out I had an intake valve spring break at 347 hours.

Regards,

Joe
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April 4th, 2005, 09:47 AM   #3
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husadawg, these parts are all in stock at huaberg headquarters, ask for BOSS aka ricky. thank you!
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April 4th, 2005, 10:00 AM   #4
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Thanks for the input and advice Joe & Ricky. I'll get the parts ordered as soon as I confirm that's the problem.

Best Regards,
Husadawg
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April 4th, 2005, 10:43 AM   #5
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April 4th, 2005, 11:01 AM   #6
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Re: Rocker Arm Failure

Originally Posted by Husadawg
what is the latest update or recommended part #'s for a rocker arm rebuild and where's the best place to order parts these days?
Husadawg
Hi Husadawg,
Said bearing failure is quite common as the OEM camshaft profiles produce excessive valetrain acceleration rates. Based on experience the average life of said components with an OEM cam is that of 60 hours.

You have options regarding camshafts including those from Tornado and myself.

Oil type is yet another issue. My personal choice is that of Chevron DELO 400 albeit that horse has been near beaten to death.

Please visit my UHE supplied gallery for more information: Gallery Link

Hope this helps.

Kind Regards,
Dale
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April 4th, 2005, 01:15 PM   #7
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Thanks Dale. I thought I remembered reading somewhere in the past that with the 03-modifed larger needle bearings, the avg expected life was increased to 200hrs. 60hrs is surprisingly short. I realize this is a racing profile cam and springs and that reduced life is the price one can expect to pay. However, as my racing days are behind me, I had hoped that the lower RPM riding I normally do would extend that life. 60 hrs....ouch!

Does your cam profile or that of Tornado significantly extend valve train life? Is so, at what cost in performance?

Thanks again for the response Dale.

B Rgds,
Husadawg
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April 4th, 2005, 09:43 PM   #8
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Originally Posted by Husadawg
...
I thought I remembered reading somewhere in the past that with the 03-modifed larger needle bearings, the avg expected life was increased to 200hrs.
...
I think they told me 100 hours. The original should be 50 hours.
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April 5th, 2005, 10:08 AM   #9
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Wtf.. My dealer tels me that my 03+ bearings should be changed at 50 hours.. Do this mean that that is overrated?..(thougt that was short) He also said that the old ones often needed to be changed around 25-30 hours.. I should ad that my bike is runned on road only as sm.. and i run it on Castrol R4 Superbike syntetic.. Changes the oil every 5 hours
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April 5th, 2005, 11:17 AM   #10
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I gather from the responses, I should count myself as lucky to have gotten 120 hrs out of this set of 03 rockers.

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