Stock Air Filters+Mac 2-1+Harley Muffler+Larry cleaned Carbs - Do I need to Rejet?
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  1. #1
    Junior Member
    Join Date
    Oct 2014

    Stock Air Filters+Mac 2-1+Harley Muffler+Larry cleaned Carbs - Do I need to Rejet?

    Like the title says, don't plan on doing pods. Have a Mac 2 into 1 coming along with THIS Muffler (#600). The carbs have been cleaned by Larry, do I still need to mess with rejetting?

    Sorry If this has been answered and thanks for any responses.

  2. #2
    Super Moderator Blindstitch's Avatar
    Join Date
    Aug 2010
    Greenfield Wisconsin
    It's going to be trial and error. Run it the way you have it and see how things are. But personally I would probably buy jets in size 90 and 120. I have a Mac and harley muffler on my cx500 and that was one combo I used. And all the carbs I have but 1 set have been gone through by Larry. Heck I even have an extra cx500 set in the other room that Larry did.
    1968 Honda CT90 Trail-Yellow Monster project
    1979 Honda CX500 Supertanker 72,000 miles.
    1983 Honda Gl650I Falcon-killer 78,000 miles.
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  3. #3
    Super Moderator CXPHREAK's Avatar
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    Aug 2010
    South Australia
    My bike has a Mac 2 into 1 with a fairly free flowing exhaust system and factory airbox with K + N filter.

    I run various sets of carbs and jetting on the bike for tuning purposes but the jetting it likes the best is 85/118.
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    Rider 81 500C, Thingy Born a 78Z. Ozdeluxe born an 80 shadow.

    GET A MULTIMETER RTFM I am a CX500. If you maintain me I will run forever.

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  5. #4
    OCR is offline
    Senior Member OCR's Avatar
    Join Date
    Sep 2010
    Groton NY
    Elevation will also have some effect on what jets you need too.
    Since noone knows where you are, all we can do is guess as to what might work best for you.
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  6. #5
    Senior Member
    Join Date
    Apr 2011
    Lexington NC
    you will probably not have to touch it try it as it is

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  7. #6
    Senior Member
    Join Date
    May 2011
    New Zealand
    I am with the other Murray on this one .

    My CX500 with 2-1 and original airbox hated 90/120 jetting. Went back to original and it was a dream to ride.
    In New Zealand

    1979 CX500 cafe

    1983 CX650ED

    1983 CX650 uber modernish cafe project bike

  8. #7
    Junior Member
    Join Date
    Oct 2014
    Great thanks for the helpful responses guys. I am located in NYC. Probably will leave it for the time being but if will try suggested jetting if I have issues.

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