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[Jims79FLH]

Has anyone had trouble with the Screaming Eagle 10.5 Pistons that come in the stage3 kit? The dealer is stating that they are drop in no machining required.

Thanks

[Unbalanced]

They are drop in, but it would be nice to know what your piston to wall is and whether your cylinders are out of round before you pay for a complete top end rebuild.   Are you sticking with .040 or .045 headgaskets or going to .030 to maximize your purchase and upgrade?     inspect the old pistons once out to see where on them and check out the heads too while they are off ... how many miles?   If your adding more compression why not upgrade to 117 and get warranty only paying a little more for jugs?   just thinking out loud.

This is the issue with part changers vs. motor builders.   Are you changing cams?   have they done a leak down to see if there were issues before you just swap out the pistons?   Whats your cranking compression today cold?   All good information to have prior to doing this rebuild.

[grc]

Has anyone had trouble with the Screaming Eagle 10.5 Pistons that come in the stage3 kit? The dealer is stating that they are drop in no machining required.

Thanks

Harley has been claiming that sort of thing for years, but no one should just take parts out of a box and slap them into the engine without checking critical dimensions first.  Harley is not exactly the poster boy for precision and accuracy.  Ask the guys with the .012" "normal" crankshaft runout, or the tapered cylinders, piston slap, etc.

What kind of a problem are you encountering with the pistons?

Jerry

[Jims79FLH]

I have a 2015 RGU CVO that I purchased a couple of weeks ago. It currently has 2,000 miles, I am going to do cams lifters Fuel Moto E serious exhaust Power Vision and think for the extra $300 the bump in compression will help it along the way. Of course I would have the piston clearances checked before completing the build. I would love to do the 117 but piston and cylinder kit is $1200 plus a new throttle body at $500 and a new air cleaner at $300 kind of blows the budget friendly build idea out of the water...

[grc]

The stage III kit comes with the SE259 cams, so the higher compression is appropriate.  I assume when you said the stage III kit you were talking about the one below (click on it to enlarge):

Jerry

[FlaHeatWave]

Yea, they're supposed to drop in, the Pistons in my SE Stage III Kit were to big, requiring significant honing...

[Unbalanced]

Sorry deleted my last post instead of editing it (small phone screen and big hands).   Are you buying the full stage 3 kit or just looking to add the pistons from it?   If you are just adding the pistons and not the kit, i would have major concerns about the cranking compression, heat and pinging.   If going with the stage3 kit, is your riding style 3200 rpm up?   This cam is a late bloomer without more cubes and compression and might be better served with an alternative cam vs. the 259e this kit as it comes off the shelf.

[Pan1]

Had a stage 3 in a 2010 CVO Ultra. The 259 cam worked very well from about 2,500 rpm except for 6th gear which needed more RPM. Bike also had a fair amount of Dyno tune time .  I really liked the cam and if I go with the 117 on my new bike, I will use this cam again.

[Jims79FLH]

So a complete list of new parts I have and plan on using. Motor has 2,200 miles

GMR 577 cams
S&S lifters
S&S push rods
Fuel Moto 2into1 E series exhaust
K&N replacement air filter
Power Vision

[Unbalanced]

Surprised not a 58mm on that list with 5.39 injectors and cometic .030 headgaskets

[Jims79FLH]

Surprised not a 58mm on that list with 5.39 injectors and cometic .030 headgaskets

Not Yet🤔

[CVODON]

This posting suprises me, Do you really think any piston would be taken out of the box, installed on the rod and installed without checking the dia of the piston and measuring the cylinder for wear and then honing with hopefully plates, to return/assure a round hole & crosshatch (I do not mean a drill mounted thorn bush, a real Sunnen rigid hone or similiar) prior to measuring/cutting the ring end gap. If this was not the original intention, then get some help. IMHO.

[Jims79FLH]

This posting suprises me, Do you really think any piston would be taken out of the box, installed on the rod and installed without checking the dia of the piston and measuring the cylinder for wear and then honing with hopefully plates, to return/assure a round hole & crosshatch (I do not mean a drill mounted thorn bush, a real Sunnen rigid hone or similiar) prior to measuring/cutting the ring end gap. If this was not the original intention, then get some help. IMHO.

Hints the apprehension and questions  versus jumping in blind. I had planned of having them checked for clearances but wasn't sure if anyone has had a problem and if it would be worth it to buy the .10 over pistons and have the barrels bored to match. My Indy that will check them is out of town and I am chomping at the bit to get them ordered. Damn inpatients

[Unbalanced]

I would go 10 over and get a clean bore to start vs. hoping they worked.   

[HD Street Performance]

A lot of dealers have no access locally for bore and honing properly done therefore sell ball hone solutions. Not acceptable. Plus when you put a stock cylinder in plates and measure there may be no wear but there will be distortion.  They won't be round and straight and based on my experience to get them to clean you now have a sloppy piston fit.