Max IV 18hp mild build help needed.

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Thread: Max IV 18hp mild build help needed.

  1. #1

    Max IV 18hp mild build help needed.

    I searched online last night and this morning for three hours and couldn't come up with links to what I'm looking for. I don't need something crazy, I just want to get rid of the throttle lag. I'm running 26" outlaws and need all the help I can get. What I'm looking at doing is a cam swap, valve springs, thinner head gaskets and governor delete. Probably going to build a new exhaust as well.

  2. #2
    Join Date
    May 2009
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    NJ 08533
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    5,052
    In the engine forum search vanguard, it's all on here.


    My new beer holder spilled some on the trails - in it's hair and down it's throat.
    Joe Camel never does that.

    Advice is free, it's the application that costs.

  3. #3
    Join Date
    Sep 2013
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    Waldo Wi
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  4. #4
    I'm not sure how I missed all that info. Makes me look bad. Maybe I was too close to see it lol.

    Offset timing keys.....will a 23hp work or do they require a different key?

  5. #5
    Join Date
    Sep 2013
    Location
    Waldo Wi
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    same key, pushrods, cam, springs, retainers all the same from 14 to 23hp

  6. #6
    Quote Originally Posted by Nubs View Post
    same key, pushrods, cam, springs, retainers all the same from 14 to 23hp
    thanks, I am going to try to keep from getting into the bottom end I think. I dont want to put a ton of money into this motor when I could swap a motor that will make way more power. I am going to limit this to a free flowing exhaust, flywheel key, 20hp intake/carb. Thinking about going with an atv carb for the tuneability aspect(I have much more experience with them). may do valve springs/retainers if necessary?? would thinner head gaskets require a starter?

  7. #7
    Join Date
    Sep 2013
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    Waldo Wi
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    941
    starter will work fine if its in good shape, i would hold off on the flywheel key t'il you get carb dialed in. spring shims will get ya 6k rpm's

  8. #8
    Oh well. Done bought it.

  9. #9
    Join Date
    Sep 2013
    Location
    Waldo Wi
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    941
    not sayin don't use it, two many changes at one time can make it hard to tune is all...

  10. #10
    did a little exhaust modding last night. made a huge difference.


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