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***ACS Rotor twin cable mod***  RSS Feed

#1 2013-09-20 9:36am

oldschoolace
Expert
From: sunny Manchester England
Registered: 2009-08-12
Posts: 850
Bikes: 8

***ACS Rotor twin cable mod***

I have been playing with the idea of running twin cables on my next build. As i dont like the look of a gyro so a modified rotor seemed the obvious choice  smile

As far as i know earlier ACS rotors have a circlip holding them together while the later ones, which are available nos on the bay have a lock nut and split pin. The mod works with either but these pics show the lock nut model.

First using a small panel pin/nail tap out the split pin FROM THE INSIDE OUT. It is slightly tapered and much easier to get out this way.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18125306_zps0f3c1090.jpg

Once removed hold the lower half of the rotor tightly (a vice is best) and undo the lock nut. It can take some effort to undo as the hole for the split pin can leave a burr on the thread.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18125932_zps87572585.jpg


Lift out the steel washer, stepped nylon washer and the bottom half of the rotor.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130013_zps76720e7d.jpg


Remove the cable (it will probably have a little nylon ball grommet at the pear end) and mark the other side of the ring for drilling. It should be central on the rings width.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130214_zpsa84d8f83.jpg


You can replace the stepped nylon washer and flick out the little black acs plug from the top section then put the two together to check your mark is exactly opposite the existing hole.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130421_zps8be1db7f.jpg

Drill a 4-4.5mm hole right through then flip it over and countersink the hole with a 6-7mm hole. Make sure the countersinks are on the same ring face. You only need to drill deep enough for the brake cable pear to sit just below the surface.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130502_zps978c66b1.jpg


http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130650_zpsc7ce6718.jpg

Next mark and drill a 5mm hole into the side of the top section where the plastic ASC lug was removed from. Tap for an M6 thread and turn in a mild steel bolt until it stops. Carefull file a flat spot on the thread as close to the rotor as you can and drill a hole large enough for a cable to run through. Cut to length for a washer and nylon lock nut.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18130740_zps11ccfc6c.jpg

Rebuild your rotor remembering to insert the cables and it should look something like this.

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18131101_zps38a8510b.jpg

http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18131200_zps7b66f4c7.jpg


http://i1182.photobucket.com/albums/x455/oldschoolace/2013-09-18131255_zpsd05cf819.jpg

The only tricky bit is drilling a cable hole through the M6 bolt. A pillar drill is needed really although i'm sure trapping the cable between two washers under a nut would work just as well.  smile



I will use this lever add on:

http://34r.cz/sites/default/files/styles/media_gallery_large/public/twin-adapter.jpg

The lever cables will be run through a rotor compatable stem with an extra stem bolt tab mounted for the second cable. The lower cables will be run through a spintech twin cable headset cup smile


I will add the finished pics when the build is done big_smile


Got a set of Knight bike co sith bars? Then shoot me a price please smile

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#2 2013-09-20 10:05am

k2.0
Centurion Member
From: Yah right, UT
Registered: 2009-08-12
Posts: 169
Bikes: 4

Re: ***ACS Rotor twin cable mod***

How are you holding the lower part of the cable guide?

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#3 2013-09-20 10:07am

Kurt_Rad
Pro MemberOriginal Gaylord
From: Here
Registered: 2011-01-10
Posts: 26238
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Re: ***ACS Rotor twin cable mod***

marked cool


I refuse to hide behind an avatar or a username.
Follow me on instagram @kurt.rad.always

Wanted:
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[img]http://uploads.bmxmuseum.com/user-images/56126/img_053859d1cd019a.png[/img]

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#4 2013-09-20 10:11am

jeffc43
Pro Member
From: MI
Registered: 2011-04-29
Posts: 555
Bikes: 46
For Sale: 1

Re: ***ACS Rotor twin cable mod***

Cool.  Marked.  smile

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#5 2013-09-20 10:40am

oldschoolace
Expert
From: sunny Manchester England
Registered: 2009-08-12
Posts: 850
Bikes: 8

Re: ***ACS Rotor twin cable mod***

k2.0 wrote:

How are you holding the lower part of the cable guide?

If i read your question right i am using one of these:

http://bmxmuseum.com/forsale/ert_lg.jpg


Got a set of Knight bike co sith bars? Then shoot me a price please smile

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#6 2013-09-20 10:53am

bob70
Banned
Registered: 2012-07-15
Posts: 603

Re: ***ACS Rotor twin cable mod***

That is very similar to what a friend of mine did bitd so he could run 2 back brakes look cool

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#7 2013-09-20 11:16am

k2.0
Centurion Member
From: Yah right, UT
Registered: 2009-08-12
Posts: 169
Bikes: 4

Re: ***ACS Rotor twin cable mod***

oldschoolace wrote:

k2.0 wrote:

How are you holding the lower part of the cable guide?

If i read your question right i am using one of these:

http://bmxmuseum.com/forsale/ert_lg.jpg

I had no idea such a thing existed. Very cool set up.

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#8 2013-09-20 11:27am

ridgeline
Pro Member
From: Calumet, MI
Registered: 2012-08-21
Posts: 760
Bikes: 2

Re: ***ACS Rotor twin cable mod***

You can't stop it, it's destiny


For while we were still weak, at the right time Christ died for the ungodly. For one will scarcely die for a righteous person--though perhaps for a good person one would dare even to die-- but God shows his love for us in that while we were still sinners, Christ died for us.
Rom 5:6-8)

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#9 2013-09-20 11:35am

jsngrimm
Dyno Freak
From: Cuyahoga Falls, OH
Registered: 2012-05-03
Posts: 2175
Bikes: 3

Re: ***ACS Rotor twin cable mod***

Sweet!! Always loved the better pull of a gyro but the look of the rotor, now theres both big_smile Lets see it installed cool


--Current Rides--
'98 Haro Zippo
'05 DK Rage

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#10 2013-09-20 11:35am

vassar
Pro Member
From: El Lay
Registered: 2009-11-29
Posts: 940
Bikes: 2

Re: ***ACS Rotor twin cable mod***

Very cool, thanks for sharing.


[img]http://i1091.photobucket.com/albums/i399/vassar_st/BMXSig.jpg[/img]

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#11 2013-09-20 10:07pm

Redline69
Pro Member
From: Cypress, TX
Registered: 2010-07-01
Posts: 850
Bikes: 10
For Sale: 2

Re: ***ACS Rotor twin cable mod***

Nice work!

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#12 2013-09-20 10:16pm

NOPOSERS
Museum Addict
From: Bellflower, CA
Registered: 2009-05-12
Posts: 1957
Bikes: 21

Re: ***ACS Rotor twin cable mod***

Subscribed....I always wanted to see this done....smile


LOOKING FOR......
One 20x1.75 tan wall PRIMO V-MONSTER
1 chrome Rhyno Lite 48 rim.
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#13 2013-09-20 10:23pm

daygogt96
BMXer 4 Life
From: San Diego, CA
Registered: 2008-05-15
Posts: 4032
Bikes: 16

Re: ***ACS Rotor twin cable mod***

cool


"How much could you know about yourself if you've never been in a fight?"
- Tyler Durden

[img]http://i584.photobucket.com/albums/ss283/orjr101/bw-sanD-faction.gif[/img]

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#14 2013-09-20 10:35pm

willy01
Pro Member
From: Brandon, MB. Canada
Registered: 2009-10-22
Posts: 938
Bikes: 9

Re: ***ACS Rotor twin cable mod***

cool


i'm always online, but I come on the site a few times during the day....

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#15 2013-09-21 2:43am

Frank250
Pro Member
From: Los Angeles, CA
Registered: 2006-08-29
Posts: 2017
Bikes: 34
For Sale: 16

Re: ***ACS Rotor twin cable mod***

cool


• Looking for Mid 90's Boss Hogg Decals •

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#16 2013-09-21 2:47am

oldschoolace
Expert
From: sunny Manchester England
Registered: 2009-08-12
Posts: 850
Bikes: 8

Re: ***ACS Rotor twin cable mod***

jsngrimm wrote:

Sweet!! Always loved the better pull of a gyro but the look of the rotor, now theres both big_smile Lets see it installed cool

This was exactly my thinking, its seemed logical that a rotor that pulls up perfectly square to the stem shaft would run alot smoother smile

Installed pics coming soon big_smile


Got a set of Knight bike co sith bars? Then shoot me a price please smile

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#17 2013-09-21 5:42am

Bling! Bling!
20% cooler
From: Lake Mary, Florida
Registered: 2010-06-30
Posts: 1025
Bikes: 16

Re: ***ACS Rotor twin cable mod***

I want to see the stop of the upper cables just above the gyro.


You don't HAVE to build every frame and fork you own... right?

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#18 2013-09-21 5:53am

oldschoolace
Expert
From: sunny Manchester England
Registered: 2009-08-12
Posts: 850
Bikes: 8

Re: ***ACS Rotor twin cable mod***

Its going to be an rotor compatable stem like this:

http://www.mauricemeyer.com/BMX/RobQ/pics/Products/ACS55stem.jpg

With the stem tab you get with an acs rotor (for non compatable stems) like this:

http://i207.photobucket.com/albums/bb110/amores1904/RR11.jpg

alternatively you could use two tabs, one on top of the other smile


Got a set of Knight bike co sith bars? Then shoot me a price please smile

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#19 2013-09-21 6:53am

getmoney
Pro Member
From: Ontario, Canada
Registered: 2008-12-02
Posts: 1659

Re: ***ACS Rotor twin cable mod***

I've thought about this conversion as well, you could modify an upper Gyro cable and still run
an older lever if you wanted, because you could just cut the ends off and alter each length accordingly.
Looking forward to hearing how it works out. Dave.


Trying is the first step to failure

Skin on skin or it doesn't go in

Believe none of what you hear and only half of what you see

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#20 2013-09-21 7:40am

poppa wheelie
Pro Member
From: Indiana
Registered: 2010-11-12
Posts: 1059
Bikes: 1

Re: ***ACS Rotor twin cable mod***

Great minds think alike, I seen this done late 80s but the gyro over ruled the rotor at the time so it was a forgotten memory. Good job.


If I didn't freestyle yesterday, I wouldn't be freestyling today.

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#21 2013-09-21 8:25am

HUTCH-HUNTER
Pro MemberAKA MATT JONES
From: Murrieta, CA
Registered: 2010-10-23
Posts: 1656
Bikes: 19

Re: ***ACS Rotor twin cable mod***

THIS IS AWESOME!!!!!  I am going to do this someday!!!!!   Nice Job!!!smile

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#22 2013-09-21 9:15am

Bling! Bling!
20% cooler
From: Lake Mary, Florida
Registered: 2010-06-30
Posts: 1025
Bikes: 16

Re: ***ACS Rotor twin cable mod***

I like this arangement better. I borrowed the picture from a museum member's for sale post.

http://i1113.photobucket.com/albums/k512/83dback/IMG_20130126_111022_761.jpg


You don't HAVE to build every frame and fork you own... right?

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#23 2013-09-21 9:27am

oldschoolace
Expert
From: sunny Manchester England
Registered: 2009-08-12
Posts: 850
Bikes: 8

Re: ***ACS Rotor twin cable mod***

Cool. Interesting that the plate is made by Lee Chi. smile

Looks like it only has 1 lower cable


Got a set of Knight bike co sith bars? Then shoot me a price please smile

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#24 2013-09-21 9:54am

freestyle4me
Museum Addict
From: The Peach State
Registered: 2009-06-06
Posts: 1481
Bikes: 17

Re: ***ACS Rotor twin cable mod***

Cool.  I too would like to see this mod finished.


Cool, a new bike.  Wait a minute.......where am I going to hide this one.  She's going to catch me...

Wanted: 90 Holmes f/f decals, Odyssey parts in vapor blue

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#25 2013-09-21 10:03am

general hustler
Pro Member"GHramps"
From: Location,Location,Location!
Registered: 2011-02-05
Posts: 4681
Bikes: 12
Website

Re: ***ACS Rotor twin cable mod***

oldschoolace wrote:

http://34r.cz/sites/default/files/styles/media_gallery_large/public/twin-adapter.jpg

Cool lever. Do they make a 2 finger Clito? lol

Last edited by general hustler (2013-09-21 10:04am)


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