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Kawasaki F7 175cc Thread

Discussion in '2 smokers' started by the_doc, Mar 4, 2014.

  1. RockyRue

    RockyRue Long timer

    Joined:
    Dec 19, 2008
    Oddometer:
    2,189
    3 lines
    Fuel
    Vacuum petcock
    Atmosphere, I think this is the one you have plugged
    With the rubber boot off the top of the carb area, I kept the vacuum petcock line and plugged it outside the boot
  2. sjc56

    sjc56 Long timer

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    So should the atmosphere remain open, unplugged?
  3. aptbldr

    aptbldr easy rider

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    Oddometer:
    1,571
    Location:
    Upstate South Carolina, USA
    Open-to-atmosphere.
  4. sjc56

    sjc56 Long timer

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    Location:
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  5. sjc56

    sjc56 Long timer

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    Oddometer:
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    Thanks for the explanation. It's a big help.
  6. sjc56

    sjc56 Long timer

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    This shows what lines are what. F7 carb.jpg
  7. Dirt2007

    Dirt2007 Long timer Supporter

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    Oddometer:
    4,632
    Location:
    NEOK
    Picked this up a couple weeks ago. 1973. One owner. 825 miles. Bought it from a relative. I rode it 8 years ago but not running at the moment. Uncle thinks it's the ignition coil. Hope to find time to dig into it in the near future.
    20180904_080213.jpg
    spokester, ONE2NINE, aptbldr and 2 others like this.
  8. sjc56

    sjc56 Long timer

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    Nice! Same color as mine and you have the rare optional passenger seat . Should be easy to get back running, I'm pretty sure you will need new crank seals, just smart to replace them. Lack of spark could be coil or the electronic ignition module. It will run without a battery if you want to check for spark.
    Dirt2007 likes this.
  9. Slumlord Steve

    Slumlord Steve Adventurer

    Joined:
    Jun 16, 2018
    Oddometer:
    11
    Location:
    48025
    Exactly like mine ! i am in the same predicment ....

    it use to run with a tad of starting fluid now...I cant get a pop out of it .... WTF ?

    it gets kind a spark ..not the largest spark ...

    would love any advise ? Thanks
  10. RockyRue

    RockyRue Long timer

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    Dec 19, 2008
    Oddometer:
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    Block off the "fuel pump" hose at the front of the engine
    Replace the crank seals
    [​IMG]
    AtLarge and Redclayrider like this.
  11. Slumlord Steve

    Slumlord Steve Adventurer

    Joined:
    Jun 16, 2018
    Oddometer:
    11
    Location:
    48025
    plug that where the hose goes ? or make a block off plate ?

    I will Report back Monday...

    Thank you for Taking your time to assist me.
  12. RockyRue

    RockyRue Long timer

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    Block off or just put a vacuum plug on the drain spout and safety wire in place
    There is a membrane in there that acts like a 'pump' and if the membrane fails, huge air leak
    The other air leak is crank seals
    Then the carb and the places where that fails
    Click on the picture and look at the thread on Thumper Talk.
    Good info there
  13. Slumlord Steve

    Slumlord Steve Adventurer

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    why would i need a saftey wire?
  14. aptbldr

    aptbldr easy rider

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    Like those little bells, it makes things safer.
  15. RockyRue

    RockyRue Long timer

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    Vacuum caps are designed for vacuum application
    This is technically a pressure application followed by a vacuum application.
    The crankcase is going to suck then push on the outlet
  16. Slumlord Steve

    Slumlord Steve Adventurer

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    i will do this tomorrow and report back.
  17. Dirt2007

    Dirt2007 Long timer Supporter

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    Got it running. Put the old coil back on, new gas and fired up on the sixth kick. :clap
    Redclayrider and AtLarge like this.
  18. Dirt2007

    Dirt2007 Long timer Supporter

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    So I need the carb cover gasket. Checking EBay I see I can get a NOS gasket or a new gasket cut to order. Is a new one going to be better than one sitting on the shelf for 45 years? Also, any word of advise on fork seals?
  19. AtLarge

    AtLarge Been here awhile

    Joined:
    Apr 15, 2009
    Oddometer:
    212
    I have had mixed luck with nos. Some so old they practically crumble in the package. Other break during install. If its just the outside cover I would get aftermarket.
    Dirt2007 likes this.
  20. Slumlord Steve

    Slumlord Steve Adventurer

    Joined:
    Jun 16, 2018
    Oddometer:
    11
    Location:
    48025
    Due to weather issues here in Michigan on Monday i was not able to work on the Bike. Who knows maybe Tomorrow?