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Thread: 350x blown Base gasket

  1. #1
    Join Date
    Mar 2006
    Location
    WI
    --
    128

    350x blown Base gasket

    Seem to have blown mine after re-jetting it richer. Its leaking oil pretty badly.

    I wanted to take it on a trip this Sunday, and getting a base gasket by then isn't going to be easy. Can I just RTV the crap out of it and will it hold? It does have a high compression piston in it though.

    Let me know what you guy think.


    Also, Anyone have torque specs for the head off hand?

    Jake

  2. #2
    Join Date
    Nov 2002
    Location
    Kirkville, NY
    --
    3,831
    I would stay way from the RTV.

    Go the the auto parts store and get a roll of gasket paper. Take apart your top end and trace a new gasket on the paper with your old one. Cut out and instail.
    1984 Yamaha YT 60 Tri Zinger(current project)
    1983 Yamaha YTM 200 (rear suspension kit)..... long term project
    2004 BMW R1150R
    1972 Honda CT 70
    2007 Lifan 110

  3. #3
    Join Date
    Mar 2006
    Location
    WI
    --
    128
    Thank you both, I think the gasket cut out idea should work fine.

  4. #4
    Join Date
    Feb 2004
    Location
    Columbiaville, MI.
    --
    1,508
    In a pinch ,someone can get through anything!! I would order up a new gasket set,and take her apart and make a gasket to get through the weekend,and then as much as it sucks ,take it apart and do it proper next weekend ,If you really wanna ride!!!
    www.muddogs.org - My New Website

    MDR Racing

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  5. #5
    Join Date
    Mar 2006
    Location
    WI
    --
    128
    Yup, that was my main plan! I wanted to get this running and looking great. Its coming along

  6. #6
    Join Date
    Dec 2005
    Location
    Wisconsin
    --
    1,141
    where you at in WI man? any how to fix a head gasket on the cheap. get your self one of those tin pans one would cook a turkey in, and cut it out the same as your gasket. that will get you by. and it works good to.
    YTM-200, Wheeling machine!!!






    1985 Honda 200x...


    ...Just a simple mild 200x

  7. #7
    Join Date
    Mar 2006
    Location
    WI
    --
    128
    haha thanks, but it was the base gasket, the head was fine.

    Just a little update, I did use some Ace High Temp gasket roll stuff and cut out a new gasket (couldn't even trace the old one, too torn up!) and it has been holding great so far. Only took 6 hours or so to pull the motor, tear it down, and throw it back in

    BTW, I'm in Mukwonago

  8. #8
    Join Date
    Oct 2002
    Location
    Minnesota
    --
    784
    I don't think a high comp. piston would effect a base gasket. Maybe make sure the crank case tubes are clear and not building up pressure?

  9. #9
    Join Date
    Mar 2006
    Location
    WI
    --
    128
    When I was taking it apart, I found out that a few of the nuts for the head were loose right over the top of the part where the base gasket blew out. I will check those though, and see how they look.

    This work was done by a performance shop and most of hte head bolts/nuts came loose!

    Good thing for Loctite

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