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Thread: 650 jetting

  1. #1

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    650 jetting

    Gotta 92 650 SL that I had given to me, it had a weak piston in it so I am boring it over 20 thou on all thee cylinders. now will the carbs need to be rejetted or is there enough ajustment in the needles.
    I'm new to the site and what i've seen and looked up has been really great and informative
    Thanks


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome

    The jetting should be fine.

    Are you already planning to clean and rebuild the carburetors?

    Have a look below for more info

    Polaris Fuji (blue) engine

  3. #3

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    Going though the carbs now changing fuel lines get rid of the outocock and the restrictor in the fuel return is missing. I should have the new pistons this weekend so by next week I should have every thing together to drop back in

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Welcome to the Hulk.

    Jetting should be OK. Maybe give the high speed needles another 1/4 turn OUT to compensate for the larger bore.

    Be sure to also inspect your petcock for restriction, and the fuel lines inside the gas tank.

    Not a bad isea to replace the oil lines if you're keeping the oil injection.

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