CHOP CULT HOME
Email Password
Search
  1. #1
    Junior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Nov 2015
    Posts
    15

    Default What cylinders to purchase?

    Recently I had blew a head gasket on my 1988 1200 sporty “4 spd” an in result of blowing a head gasket doing burnouts I had also broke a fin off the cylinder so in return I am now looking for new cylinders I haven’t quite made up my mind in purchasing a set 1250 cylinders or simply buying another set of 1200 cylinders high ratio then adding cam’s an head work none the less what are some companies to look into for a set of cylinders an reason why you say that company?

  2. #2
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Jul 2010
    Posts
    945

    Default

    NHRS - very good quality and great customer support.

  3. #3
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Dec 2017
    Posts
    3,015

    Default

    Quote Originally Posted by BadMonkeyMW View Post
    NHRS - very good quality and great customer support.
    NRHS? http://www.nrhsperformance.com/

  4. #4
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Aug 2017
    Posts
    111

    Default

    Hammer Performance. I have not personally done a conversion but know folks that have and were pleased. They do lots of Dyno testing and post performance reports on their website. If I ever do a rebuild or conversion I plan to use them. They offer 1275 kits now, several kinds of cams and are a machine shop that does head work on site. They race what they make as well, so hands on all the way.

    Somewhere on the XLF is a thread about Hammer upgrades installed with dyno results I think.

    Cotton1

  5. #5
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Sep 2010
    Posts
    13,019

  6. #6
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Sep 2012
    Posts
    12,459

    Default

    Just remember nothing will hold up to high prolonged revving no matter how great the parts are.......

  7. #7
    Senior Member

    Content on this page requires a newer version of Adobe Flash Player.

    Get Adobe Flash player


    Join Date
    Dec 2016
    Posts
    138

    Default

    NRHS & Hammer both sell aluminum drugs with an iron or steel liner.

    They claim that their cylinders are more rigid than the original ones. I can't speak to other that's true or not. What I can tell you is I've seen very low mileage OEM 1200 cylinders that were obviously not round, because the rings were touching in some places and not others.

    The four bolts going through were basically pulling them Square

    The Axtell cylinders that were mentioned above are recommended by hammer for heavy-duty usage, they tend to hold the cases together as well as being good and round.

    FWIW, I believe that those 4 speed Evo Sportsters use essentially the same clutch and transmission as the late 1984 and 85 iron heads. Which also have some of the weaknesses of all the other Ironhead Transmissions

    If you are really intending to wail the fuck out of this thing, you might want to think about simply bolting in a 5-speed engine right off the hop, which would get you a better gearbox, and get that fucking alternator off of the clutch hub
    Last edited by thecarfarmer; 04-15-2018 at 10:25 PM. Reason: There's no way I can fucking plan what I'm typing, is there? Hell no, just go back and edit it a hundred times

Share This



Tags for this Thread

Posting Permissions

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

Log in

Log in