Emulators..
Close

Emulators..

This is a discussion on Emulators.. within the Technical forums, part of the Caferacer.net Forums category; Emulators... RaceTech.. 35mm.. '78 Yamaha SR500.. street bike. Are they all that and more as I have been reading?? Sounds as though they are the ...

Results 1 to 7 of 7

Thread: Emulators..

  1. #1
    Senior Member Tonnystark's Avatar
    Join Date
    Jun 2012
    Location
    , florida, USA.
    Posts
    405

    Emulators..

    Emulators... RaceTech.. 35mm.. '78 Yamaha SR500.. street bike.

    Are they all that and more as I have been reading??
    Sounds as though they are the ideal for a street bike ridden under various road conditions and thru some twistys..I have progessive springs set my weight and the bike ..I also use one .75 inch spacer that can be reduced for the emulators additional thickness....

    I have read the bits here posted thru forum search especially enjoyed the thread originated by joe c., yet none have posted their findings all that well as to their improvement or not.....

    They sound like a nice additional handleing upgrade....thoughts?
    Last edited by Tonnystark; 02-28-2013 at 10:06 PM. Reason: same as always ..fat fingers and better clairity
    78' SR500
    64' YG1S
    15' XT250

  2. #2
    Senior Member KeninIowa's Avatar
    Join Date
    Feb 2006
    Posts
    2,670
    What did Joe C's thread say? He's a racer, I'm just a street stroke with a keyboard.

    I'd dumpster those progressive springs. Straight-wound until someone builds digressive. I suppose you could put them in upside down.

    Springs control the wheel. Damping controls the spring. Fixed orfice damping rods have one theoretical shaft velocity they're right. Talking shaft velocity not ground speed.

    SO you plomp in your emulators, you now have variable orfice valving. Theoretically they can be made right for a range of shaft velocities= more better.

    I put a pair in my 86 GSXR, even did an installation thread if'n you want to search. Haven't ridden the bike enough to be definative, but it's better. Makes you realize how bad the rear shock sucks right off. Until the bike's balanced suspensionally you'll never be able to take full advantage.

    Now it drives the front wheel in the ground so it'll cut rather than laying over like a fat girl, but that's from the springs, but you have to change the damping, less compression more rebound, to control a stiffer spring.

    You could make damper rod forks cut as good, but then they're going to be clunky in low-speed situations, here again talking shaft velocity not ground speed.
    Last edited by KeninIowa; 03-01-2013 at 07:21 PM.

  3. #3
    Senior Member o1marc's Avatar
    Join Date
    Sep 2012
    Location
    Dawsonville, Georgia, USA.
    Posts
    7,012
    Quote Originally Posted by KeninIowa View Post
    What did Joe C's thread say? He's a racer, I'm just a street stroke with a keyboard.

    I'd dumpster those progressive springs. Straight-wound until someone builds digressive. I suppose you could put them in upside down.

    Springs control the wheel. Damping controls the spring. Fixed orfice damping rods have one theoretical shaft velocity they're right. Talking shaft velocity not ground speed.

    SO you plomp in your emulators, you now have variable orfice valving. Theoretically they can be made right for a range of shaft velocities= more better.

    I put a pair in my 86 GSXR, even did an installation thread if'n you want to search. Haven't ridden the bike enough to be definative, but it's better. Makes you realize how bad the rear shock sucks right off. Until the bike's balanced suspensionally you'll never be able to take full advantage.

    Now it drives the front wheel in the ground so it'll cut rather than laying over like a fat girl, but that's from the springs, but you have to change the damping, less compression more rebound, to control a stiffer spring.

    You could make damper rod forks cut as good, but then they're going to be clunky in low-speed situations, here again talking shaft velocity not ground speed.

    Would it matter if a progressive spring were put in upside down? The spring doesn't know up from down. Force is put to it and the weaker end compresses first no matter what end it is on.
    www.CreativeCandy.org

    I carry a gun because I'm too young to die, too old to take an ass whooping, and a cop is too heavy.

  4. Remove Advertisements
    CafeRacer.net
    Advertisements
     

  5. #4
    Senior Member crazypj's Avatar
    Join Date
    Nov 2008
    Location
    Altamonte Springs, Fl. USA, Bridgend, South Wales, U.K.
    Posts
    3,437
    Quote Originally Posted by o1marc View Post
    Would it matter if a progressive spring were put in upside down? The spring doesn't know up from down. Force is put to it and the weaker end compresses first no matter what end it is on.
    You should really fit straight rate springs with emulators, progressive springs 'confuse' them
    The reason for having closer coils at the top is to reduce unsprung weight
    I dabble in rocket science, when I\'m not picking my nose
    The other night I gave my girlfriend an orgasm, but, she spat it back at me

    'you can take my word for it or argue until you find out I'm right'

  6. #5
    Senior Member Tonnystark's Avatar
    Join Date
    Jun 2012
    Location
    , florida, USA.
    Posts
    405
    Not sure if this is allowed here but here is the link to that thread... https://www.caferacer.net/forum/vinta...xplain-me.html

    thanks for the replys. I do think that from whats in joes thread and in various other searches here and on different sites that these would work as well with progressive springs...I am gathering that they regulate fluid control (oil ) so much more effectively than a fixed orfice especially under harsh compression and rebound.. I have also read that they intended to be used with fixed rate spings , but have read that with progresives, they have been effective..
    I have never had an issue with this not holding a turn well ,exit or entry , it just tends to dive on the big front brake like I got a fat girl on the back when stopping ....The factory orfice sizes work well , just thinking that these could improve front control even more and to some degree the rear as it is affected by the fronts reaction to compression and rebound..
    78' SR500
    64' YG1S
    15' XT250

  7. #6
    Senior Member Tonnystark's Avatar
    Join Date
    Jun 2012
    Location
    , florida, USA.
    Posts
    405
    Having thought it over this week and applying 'what would I gain by this?' that I will stay with just the progressive rate springs, rather than adding emulaters into the mix..I am happy with handling on this bike bike from the factory other than it needing more resistance to front end dive while braking .... While in the tubes replacing 35 year old seals, I'll clean up the orfice openings to facilitate better fluid control and experiment some with oil weight and quantity.. thanks for your replys..
    78' SR500
    64' YG1S
    15' XT250

  8. #7
    Senior Member kenessex's Avatar
    Join Date
    Oct 2005
    Location
    Galena, AK, USA.
    Posts
    5,780
    I have been happy with Yamaha forks on my racebikes without emulators. If you are getting too much brake drive, try a little more preload on your Progressive springs. I use Progressive springs in my FZ600 forks. They have air fittings and about 5lbs of air helps a lot.

    Ken
    WERA 119
    CCS 119
    CRA 119
    AHRMA not anymore
    \"Think twice before you speak, and then you may be able to say something more insulting than if you spoke right out at once.\"
    Evan Esar
    Newbies, Geeto and Tex (Bye Tex)hate me!!

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. cartridge emulators
    By roccitycafe in forum Technical
    Replies: 8
    Last Post: 04-23-2011, 08:27 PM
  2. RaceTech Fork emulators
    By aaron in forum Parts For Sale
    Replies: 1
    Last Post: 08-19-2010, 05:05 PM
  3. gold valve emulators
    By JM360 in forum Technical
    Replies: 31
    Last Post: 06-24-2010, 02:07 AM
  4. Question about cartridge emulators.....
    By Swagger in forum Technical
    Replies: 3
    Last Post: 02-01-2009, 06:01 PM

Search tags for this page

sr500 emulaters

,

sr500 emulators

,

sr500 fork emulators

,

sr500 forum race tech

Click on a term to search for related topics.