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  1. #1

    Join Date
    Feb 2017
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    Yamaha lb80 happy oil leak

    I've got a 75 Chappy that runs great but after it sits injection oil leaks out of the vent pipe at the bottom of the carb. Any ideas??

  2. #2

    Join Date
    Nov 2008
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    Must be something wrong with the carb. Might be a good idea to give it a service.

    You could also empty the oil tank and just premix the fuel yourself.
    Rides

    CRF88 MOD | TB 88 Kit, TB Race Head, TB CDI, Fast 50's Triples and Bars, Sano Exhaust, Taky Shock, Sik50's Extended Brake Lever, FiveO Pegs
    2012 LXR 190 Anima Race Bike|NGK Lead, NGK Iridium Plug, Zhocci Forks, Elka Shock, ProCircuit Pipe, Kehnin PE 28mm Carb, Renthal Fat Bars, Custom Miniriders.com Sticker Kit

  3. #3

    Join Date
    Feb 2017
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    Thanks for the response. But why would oil leak from the float bowl vent on the bottom of the carb and not fuel??

  4. #4

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    Not 100% sure as not massively familiar with that style of carb.

    All I do know is not many people let the carb do the mixing. If you got a blockage then your motor get's no oil.

    Better off pre mixing so you never have that issue.
    Rides

    CRF88 MOD | TB 88 Kit, TB Race Head, TB CDI, Fast 50's Triples and Bars, Sano Exhaust, Taky Shock, Sik50's Extended Brake Lever, FiveO Pegs
    2012 LXR 190 Anima Race Bike|NGK Lead, NGK Iridium Plug, Zhocci Forks, Elka Shock, ProCircuit Pipe, Kehnin PE 28mm Carb, Renthal Fat Bars, Custom Miniriders.com Sticker Kit

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