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[Sruth929]

I know this is been posted to death but I can’t find the exact parts needed. I have a all stock 2014 CVO 110 with 15k miles and want to change the lifters with S&S lifters. What part numbers should I use? I believe I’ll pull the rockers and reuse the pushrods.

[r0de_runr]

Precision Tappets for 2017-19 M8 1999-17 big twins and 2000-19 XL Models

$224.95  on s&s web site

[HD Street Performance]

May I suggest Hylift Johnsons made in USA with axle oiling and slow bleed design at 65% less?

[Aussie]

May I suggest Hylift Johnsons made in USA with axle oiling and slow bleed design at 65% less?

May I ask the advantages of using Johnson over S&S lifters and what is the recommended mileage change for both.
Just curious as I have changed out the lifters in my 110 quite a few years ago from the standard C to S&S lifters after all the lifter failures reported.
After changing to S&S I did notice the valve train is much quieter but still has the 2600-2800 rpm rattle but nowhere near as bad as it was with the standard C lifters.

[HD Street Performance]

The Hylifts are a slow bleed design which helps with noise. They have axle oiling and I would be servicing these lifters at 25k intervals  on a cvo. The 2600-2800 noise issue can be solved but takes a cam change. The stock cam has steep ramps. I recomend putting in rocker lockers while in there. I use them whenever I am in the top.

[SteveVO]

HD, when you say service at 25K intervals for the Hylifts, what does that mean, pull and examine, repack bearings or replace?  Replacing every 25K seems a bit excessive.

I have a 2015 CVO 110, with 21K miles so replacing the stock lifters is number 1 on my to do list.   

[r0de_runr]

Those 110's have dual wound valve springs that are pretty stiff compared to some others.  However do not make the same mistake I did and change to single wound behive AV&V springs.  I broke a spring and had to rebuild my top end.

Because the springs are so stiff is one reason to swap out the lifters, and the ramp of those 255's like HD Street said.
The op asked about S&S so I showed him what S&S sells now, doesn't look like they sell standards and premiums now.

As for me I'm running Comp Cam's 850-4s in my 14 limited. (yes I've seen the video)

[grc]

HD, when you say service at 25K intervals for the Hylifts, what does that mean, pull and examine, repack bearings or replace?  Replacing every 25K seems a bit excessive.

I have a 2015 CVO 110, with 21K miles so replacing the stock lifters is number 1 on my to do list.

If you were talking about any other vehicle you would be correct, a lifter replacement at 25k is almost unheard of these days.  However, you are talking about a H-D CVO110 engine, many of which have had catastrophic failures at 10k to 15k miles.  A lifter change at 15k to 20k is cheap insurance, compared to a $5k engine repair bill.  If you want a longer term fix, you'll need to scrap the stock cams and valve springs.

JMHO - Jerry

[HD Street Performance]

The stock springs are not "too stiff". They do have trouble controlling  the stock cam and loft at the rpm stated. Reason is flex of pushrods, cam lobe design, and valve train weight. Lifters just get caught in the mix. Not the noise solution by itself.
I use a dual spring that is 140# seat with a 400# spring rate, .670 max lift.

[J.D.]

grc (Jerry) is spot on IMHO.

[HD Street Performance]

As further evidence consider the 03-06 cvo 103. Same springs, pushrods, and lifters comparable. They did not eat lifters. Lofting a roller lifter murders any of them.

[PBSTN]

As further evidence consider the 03-06 cvo 103. Same springs, pushrods, and lifters comparable. They did not eat lifters. Lofting a roller lifter murders any of them.

Please elaborate more. As I have a 2003 103".

[HD Street Performance]

Well those cvo 103 heads have the same springs and similar valves to the 110 cvo head. They didnt burn through lifters.

[timo482]

am i reading that 255 cams may cause trouble at 3000 rpm? i thought it was at high rpm that they caused trouble???

[HD Street Performance]

Yes, the cams have very fast ramps. When cam is changed these lifter issues diminish with many grinds.