My top end WAS noisy on my 120ST---FIXED IT! - Road Glide Forums
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post #1 of 28 (permalink) Old 02-20-2016, 09:15 AM Thread Starter
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My top end WAS noisy on my 120ST---FIXED IT!

Since day one, my 120ST has been noisy on the top end and was very prominent when hot... especially between 2600-3000 rpms. I was told it was NORMAL and had dealt with it day by day.... I wasn't buying it. There is no way I should here top end noise at 80mph over an Arc XDI 600.4 amp pushing 4 high-end speakers.

I found out about ROCKOUTS on another forum a few months ago and decided then, that this could be a viable solution ( to correct a potential problem ) that I 'might' be having.

It never got better or worse... so I bought the $15 rockouts and hung them on the bench in the garage for a rainy/snowy day.

I picked up some adjustable pushrods and yesterday decided to tear into it... GLAD I DID!

Once I got in there ( following the manual ) and took the rocker support housing off the rear cylinder, it was obvious that 'something' just wasn't right.



First clue was the right side bolt on the exhaust side.. VERY HARD to get out compared to the other 3



Second clue was the offset position of the rocker shaft itself...



Third clue was noticed looking into the bolt hole of the rocker support....



Fourth clue was the rocker shaft when I pulled it out of the housing with very LITTLE effort.... witness marks from rotational action



( they are not supposed to move this easy )


Here is a video...

Rocker Shaft Video

After finding all this... I called my HD tech and sent him pics... and told me to bring the parts in for inspection... afterall... only 3000+ miles and still under warranty ( I was 'cleared' by HD on this before I started )

Everything was within tolerances but it was clear to them that this had to be what we were hearing in the top end.

They agreed with me installing the Rockouts should cure the issue of the shafts bouncing off the bolts and moving around during operation.



After cleaning up and re-installing the shafts and aligning them, I installed the kit with ease... instructions are perfect and very simple.

Here you can see the ROCKOUT inserts installed.



I reassembled the rear cylinder with the new SE adjustable pushrods and took the advice of my HD tech to go 3 full turns on the rods vice 2.5 as stated in the instructions. He said the tighter tolerance will run better and quieter.... he has been an HD tech for 15+ years, so I trust him.

I did the front cylinder and found the same issues....

Got it all back together... and......

WOW!!! I have NEVER heard my 120ST so quiet since day one!!! Every bit of noise I was hearing is GONE! I ran it up to around 285 degrees at idle to get the oil nice and hot and rev'd to 2600-3000 rpms where the noise was most prominent... NOTHING AT ALL!!!

I couldn't be happier at this point! Gonna be takin er out today for a ride, so that will be the ALL-TELLING truth.....

Just wanted to share this with the masses.
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2015 RGS 120ST | D&D Boss Boarzilla | 4.5" Topshop Ass | Soundz SS4.100 amp, HD-DSP ,(4) Carbon 65's and Iron 69.2's
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post #2 of 28 (permalink) Old 02-20-2016, 09:22 AM
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Nice job! I guess I will be trying the adjustable pushrods. The Rockouts took out the rattle in the rpm range you described but I still have the typical top end noise. Was thinking of going to the S&S lifters as well. Good info for the masses though. Also, nice chatting with you on FB.
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post #3 of 28 (permalink) Old 02-20-2016, 09:35 AM Thread Starter
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Originally Posted by RGKen View Post
Nice job! I guess I will be trying the adjustable pushrods. The Rockouts took out the rattle in the rpm range you described but I still have the typical top end noise. Was thinking of going to the S&S lifters as well. Good info for the masses though. Also, nice chatting with you on FB.
YESSIR! I did inspect the lifters, 'perfect fit' rods and cams for scarring ( abnormal wear indications. etc ).... nothing.

I think the compliment of adding the adj. pushrods was a key factor as well. Since I was already going in there, I figured it was worth the upgrade.

I was told to go with Woods lifters when I get around to more motor work..... S&S is a great choice, too.... decisions... sigh

Definitely great to chat with you on FB.... thanks for the info and insight you provided.
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2015 RGS 120ST | D&D Boss Boarzilla | 4.5" Topshop Ass | Soundz SS4.100 amp, HD-DSP ,(4) Carbon 65's and Iron 69.2's
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Last edited by Spazz; 02-20-2016 at 09:41 AM.
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post #4 of 28 (permalink) Old 02-20-2016, 10:00 AM
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Good job! But why do you need adjustable rods?
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post #5 of 28 (permalink) Old 02-20-2016, 10:07 AM Thread Starter
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Originally Posted by dozer23 View Post
Good job! But why do you need adjustable rods?
Best I can explain it.... 'perfect fit' rods are not 'perfect' for every application.

You are able to tighten the tolerances over a fixed pushrod and there is no possibility for slop in the valvetrain.
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2015 RGS 120ST | D&D Boss Boarzilla | 4.5" Topshop Ass | Soundz SS4.100 amp, HD-DSP ,(4) Carbon 65's and Iron 69.2's
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post #6 of 28 (permalink) Old 02-20-2016, 10:14 AM
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Quote:
Originally Posted by RGKen View Post
Nice job! I guess I will be trying the adjustable pushrods. The Rockouts took out the rattle in the rpm range you described but I still have the typical top end noise. Was thinking of going to the S&S lifters as well. Good info for the masses though. Also, nice chatting with you on FB.
If you haven't changed out your stock lifters to S&S standards (you don't need the premium) you won't believe the difference they make.Did mine last week. Tore apart one of the front c-lifters of Harley. There were inconsistencies in the valve on the inside and you could see where it was hanging up at times. Tolerances were not followed for sure. Cheaply made.
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post #7 of 28 (permalink) Old 02-20-2016, 10:28 AM
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Nice thread and valuable info this is what makes this forum so kick ass great members willing to so this kind of info.
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post #8 of 28 (permalink) Old 02-20-2016, 04:54 PM
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Which pushrods did you use?

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
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post #9 of 28 (permalink) Old 02-20-2016, 07:09 PM Thread Starter
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Originally Posted by BigNorm View Post
Which pushrods did you use?
SE non-tapered

I initially bought S&S... but when I got home, the NOTE on PAGE 3 said required to use aftermarket covers to gain access to the adjusters. I wasn't THRILLED at that point... so I went back in and swapped them out for the SE Kit that comes with covers and O-rings and not just pushrods.

2015 RGS 120ST | D&D Boss Boarzilla | 4.5" Topshop Ass | Soundz SS4.100 amp, HD-DSP ,(4) Carbon 65's and Iron 69.2's
RENO BAGGER AUDIO

Last edited by Spazz; 02-20-2016 at 07:12 PM.
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post #10 of 28 (permalink) Old 02-21-2016, 08:00 AM
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Thanks. I'll be putting my motor back together soon with the SE pushrods as well. 3 turns down eh? I got the rockouts too. It looks like they just go in 2 of the holes on each side?

2011 Road Glide Ultra, Andrews 57H, VeeTwin Performance street port, Big Sucker Intake, Rhinehart 2/1 w 4" muffler, Power commander V, Paugcho 17" bars, Stock seat recovered with leather, Michelin Comander II 140/80B front, Yokohama Envigor 205/60/16 rear. It's better on the dark side.
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