swap out Ultima Rockers

[hbkeith]

Trying to decide on swapping out the Rocker Arms on Ultima 113 before it goes in the frame , hear of them breaking 

[Deye76]

7 come 11

[hbkeith]

yep exactly

[gsxrboy96]

They ultima rockers lesve a bit to be desired, ive always ran s&s and never had a problem.

[thumper 823]

I guess I have missed the point as to why Ultima?

[hbkeith]

I guess I have missed the point as to why Ultima?

what do you mean ?

[capn]

If you dont change out the rockers just keep a close ear on the valve train noise.If it increases best to stop riding and start checking. Some say Ultima is using good rockers now. I got 8k on my 120 with no problems with S&S rockers and Feuling lifters. Best of luck to ya. By the way , dont pay heed to the Ultima haters.

[hbkeith]

S&S standard or forged rockers ?

[Deye76]

.640 lift, go with the expensive ones.
https://www.sscycle.com/products/forged-roller-rocker-arm-kit-for-1986-16-hd-big-twins/

[hbkeith]

yeah , think I will swap them out , if not it will bug the "Potty mouth" out of me thinking about them

[capn]

I used the S&S roller rockers. 900-4065A

[BKACHE]

So what breaks on the roller rockers?
The arm itself or the roller wheel shaft?
When inspecting those rockers - none had any wear on the rollers.
I inspected when a beehive spring broke. I replaced all of them with the spring in spring type.

[capn]

I hear its the pushrod end that breaks or wears out.And it happens whithin 1k miles.If you have more miles than that you should be OK.

[kd]

Like this ....

http://harleytechtalk.com/htt/index.php?topic=107206.msg1273600#msg1273600

[hbkeith]

Anyone done the swap to S&S Forged Rocker Arms , I could swear I read in my manual that the stock Ultima Rockers in my Ultima 113 are 1.725:1 ratio , called S&S just to make sure I had correct part number threw D.S. , they said no I need the 1.625:1 arms ?   Just looked at Ultima website as my manual is buried in a pile while rooms are empty for carpet , says the Ultimas have 1.675:1 ratio  , which way ?

[Hillside Motorcycle]

Pushrod cup in the rocker arm will become galled.
Lack of heat treating correctly is what we suspect.
They will fracture also.

[Deye76]

"They will fractuif re also."

Yup. Have seen it happen, friends 100" Ultima. Seems like if it happens, it's within the first 3 or 4 thousand miles.

[capn]

Its true the ultima rockers have 1.675 ratio and S&s got 1.625. I got the S&S and you will lose a hair of lift and cam duration but I figured that was good in my opinion. Less strain on valve train.

[hbkeith]

Pushrod cup in the rocker arm will become galled.
Lack of heat treating correctly is what we suspect.
They will fracture also.

You replaced them with S&S 1.625:1 Scott ?

[hbkeith]

no one else has actualy done this swap to S&S ?

[Deye76]

Lot's of people have used S&S in a Ultima. I doubt you could feel the power difference between the Ultima 1.675 & S&S 1.625.

[wfolarry]

I ran the Ultima rockers in a Fatso motor I built about 12 years ago. The bushing went bad in them & I switched them out for S&S rollers. Only difference was the noise went away. No power difference.

[MikeL]

Ultima rockers 124 640 cams 8k miles No Problems...........

                                                                                                    MIKE

[capn]

MIKEL, What date were those Ultima rocker bought? I know some have had good luck with them. Trying to figure out the common denominator. I got a brand new set of take outs .   

[MikeL]

MIKEL, What date were those Ultima rocker bought? I know some have had good luck with them. Trying to figure out the common denominator. I got a brand new set of take outs .   

Bought them used back in 2015 from a machine shop vendor from this site. Id say they were 2014 vintage? Do you think time is running out??

                                                                                                        MIKE