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New heads......

Discussion in 'Motorcycle Tech Talk' started by Tommyc, Jun 27, 2011.

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  1. Tommyc

    Tommyc Active Member

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    I'm putting new STD heads on my 1983 shovel. Any good advice for me?
    What's the easiest way to adjust the pushrods?
    Thanks guys!
    Tommyc, Jun 27, 2011
    #1
  3. JohnnyBiker

    JohnnyBiker Well-Known Member

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    yeah, use rubbers...:D
    JohnnyBiker, Jun 27, 2011
    #2
  4. hotroadking

    hotroadking Super Moderator Staff Member

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    On my tc you want to get it at tdc then adjust one that is down letit bleed down should be able to spin it but no up down slack

    I put bike in 5t gear and then rotate rear wheel to move to next one


    Sent from my iPhone using Tapatalk
    hotroadking, Jun 27, 2011
    #3
  5. cowboy

    cowboy Moderator Staff Member

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    agreed , but I use to use 3rd gear on my shovel ,
    cowboy, Jun 27, 2011
    #4
  6. Tommyc

    Tommyc Active Member

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    I read somewhere to push the lifter down half way down it's range of motion with the pushrod adjustment and leave it there.
    That puts the hydraulic lifter at half it's adjustment point. The oil pressure will adjust from there.
    Sound familiar to anyone?
    Last edited: Jun 28, 2011
    Tommyc, Jun 28, 2011
    #5
  7. hotroadking

    hotroadking Super Moderator Staff Member

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    My training is you set it to Zero lash, meaning no up and down movement but
    you can spin it with your fingers some people go a few flats past zero,

    You can turn it down farther but you risk the lifter pumping up full and then slamming
    an open valve into a moving piston, then it gets expensive.

    Usually the manuf of the pushrods have a spec, who's pushrods, HD? Crane?
    hotroadking, Jun 28, 2011
    #6
  8. Tommyc

    Tommyc Active Member

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    I don't know the manufac. They are existing in my motor. Maybe I should count the number of turns to loosen them up and just repeat the same amount of turns after new heads are on?
    Tommyc, Jun 28, 2011
    #7
  9. chucktx

    chucktx Moderator Staff Member

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    no.....the lifters may bleed down on ya while doin the heads. just be sure to put them and the lifters back in the same hole,,,,,if pulled....then set the lobes on the lowest point and adjust them to no slack but able to spin freely......
    chucktx, Jun 28, 2011
    #8
  10. hotroadking

    hotroadking Super Moderator Staff Member

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    Hey that's what I said lol


    Sent from my iPhone using Tapatalk
    hotroadking, Jun 28, 2011
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  11. Tommyc

    Tommyc Active Member

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    okay, thanks guys!
    What about solid lifters? My red has them, is there a different adjustment for them?
    Tommyc, Jun 28, 2011
    #10
  12. hotroadking

    hotroadking Super Moderator Staff Member

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    Attached HD pushrod instructions, section on solids is in there..

    Attached Files:

    hotroadking, Jun 28, 2011
    #11
  13. Tommyc

    Tommyc Active Member

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    Excellent, thanks,. That's for twin cam motors, does that matter?
    Tommyc, Jun 28, 2011
    #12
  14. hotroadking

    hotroadking Super Moderator Staff Member

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    well it at least gives you an idea of the process..

    Basically you want them to touch the lifter plus about 4 flats, let it sit
    and it should bleed down and then you should be able to spin
    it with your fingers when it's at zero lash.
    hotroadking, Jun 28, 2011
    #13
  15. Tommyc

    Tommyc Active Member

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    Sweet thanks.
    Tommyc, Jun 28, 2011
    #14
  16. hotroadking

    hotroadking Super Moderator Staff Member

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    Call John Sachs and ask him about it
    did you get the carb done by him?
    hotroadking, Jun 28, 2011
    #15
  17. Tommyc

    Tommyc Active Member

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    Nope, I asked around and was told that the Thunderjet was good for a big motor, 103ci with a big carb like a Super G. Neither of which I have so I didn't want to waste $175.
    Know what I mean? I don't have a drag bike. Not yet anyway. I'm not convinced it's worth the money.
    I am gonna ask my mechanic, Chicago Bob, about the Thunderjet and how he would adjust the pushrods. He built and warrantied my motor so chances are I will go with what he suggests. He did a great job. I trust him. He was a H-D mechanic and was trained by S&S. He knows shovels and he is gonna build up the heads for me. They are bare now. The funny part is John does machine work for Bob. I asked him.
    You guys give some good advice too. Thanks for it all.
    Tommyc, Jun 28, 2011
    #16
  18. Tommyc

    Tommyc Active Member

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    http://www.sscycle.com/uploads/feature/pushrod-adjustment-guide.pdf
    this is good info from S&S.
    Tommyc, Jun 29, 2011
    #17
  19. hotroadking

    hotroadking Super Moderator Staff Member

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    I'd think a super E would be better on the bike for the street, SNS says when in doubt Super E
    hotroadking, Jun 29, 2011
    #18
  20. Tommyc

    Tommyc Active Member

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    Thanks what I have on both bikes. I might try the Thunderjet valve in the future. Gotta get the new heads on first.
    Tommyc, Jun 29, 2011
    #19
  21. hotroadking

    hotroadking Super Moderator Staff Member

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    Thunderjet makes a big difference, the SNS carbs have a transition issue from pilot to main jet, you also need to have an external air bleed jet installed so you can change the transition point (RPM) that it moves from pilot to main.

    This allows you three tuneable fuel circuits and the ability to set when they come
    into play, the bike will run better, you'll get better mileage and better power...
    hotroadking, Jun 29, 2011
    #20
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