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Author Topic: Reliable valvetrain for a 110 CVO  (Read 1892 times)

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GBRAVO

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Reliable valvetrain for a 110 CVO
« on: February 28, 2011, 01:45:15 PM »

Bike Configuration:
2008 CVO Road King
Stock Cam SE 255
Stock lifters 18538-99B
SE air cleaner
Thundermax
SE Exhaust.

Problem:
The rear exhaust lifter is damage, deep scratches in the roller.
So I need to install new lifters, cams and the cam bearings.

Possible solution:
I’m happy with the current bike performance and I would like to improve the reliability to avoid that this happen again.

Base on that I would like to keep my stock pushrod, the 2 springs per valve and the stock rockers.

Regarding the cams bearings, I would like to use the Torrington B-168.

For the cam, I’m ok with the SE255, but if there is a better one bolt-on that provides a better torque in the touring RPM without jeopardize the reliability and noise, I’ll be happy to change. Some people recommend de Andrew 54VS, but I don’t know how it works in a 110 CVO.

Finally the lifters. I don’t want use the S&S or the Wood performance because it requires adjustable pushrods, with the stocks “B” (made by Delphi) I already had problems, the SE and JIMS have bad reputation in the market, so I’m thinking in the old (before 2001) Johnson Hylift.
I found these two providers:
1) AMS-MotoMachine & Supply  AMS A2313S (http://www.automotivemachine.com).
2) Parts4powertoys  V-2313S (http://www.parts4powertoys.com/)

I’m really appreciate your comments and suggestions.
Thanks in advance.
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GBRAVO

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Re: Reliable valvetrain for a 110 CVO
« Reply #1 on: February 28, 2011, 03:47:27 PM »

I got this very interesting comment that I want to share with you all.
In the bottom of my mind I knew that the root carouse could be valve guide, but it was more easy and less work overlook that and blame the roller material.
Now I need to think about this


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So what may have caused the lifter to go? The root cause before we jump out with a solution.
The SE CVO 110 has a problem seizing rear exhaust valves in the guide. I have seen many partially there and a few pull the guide right out of the head. If yours was on the verge of seizing this could toast a lifter. How to remedy the problem and make the CVO top end reliable
1. Pull the heads and replace the guides with AV&V parts sized to the proper clearance and perform a good valve job, install AV&V seals
2. Replace the stock rockers with S&S, Baisley or other high quality roller rockers
3. Replace the cam and lifters with new OEM parts and inspect the oil pump and crank for runout at this time
4. Adjustable pushrods are not required but I would check to be sure after the rollers are installed that the preload is correct, This can be accomplished with an adjustable. If you want to be on the easier side of things just use the HD adjustable pushrods 18404-08. Your installer will love you for canceling hassles.
5. Flush the oil system before going back together including taking the pan off. One area that can't be sure is clear are the rod bearings, have to roll the dice there.
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