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Thread: 1980 Suzuki SB200 - first run in 20 years

  1. #1
    A Bit Bored
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    Post 1980 Suzuki SB200 - first run in 20 years


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    Hi,
    Trying to get a 1980 Suzuki SB200 running again after standing for 20 years.
    I've cleaned out the carbs and changed the float needle & seat. Changed the air filter, spark plugs .
    She started up but is running really rough. Thought all it needed was a good run. However, when I turn the choke off the left cylinder dies and the right keeps running but bogs down a bit. The carbs on the bike are Mikuni VM18SS's.
    Not sure where to go from here.

    Any suggestions?


    Thanks


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    Should Get Out More maccecht's Avatar
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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Seals will be fuc&5d no compression its a 2T new seals required.

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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Compression seems okay though.

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    Should Get Out More a_morti's Avatar
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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Points?

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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Quote Originally Posted by james514 View Post
    Compression seems okay though.
    Crankshaft seals wouldn't show up any difference in compression. That would be my first suspicion although points as a_morti says would be easier to change. Worth new condensers as well (if it's that sort of ignition system).

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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    SB200s are CDI, so no points etc to worry about.

    Have you had the carbs completely apart and ultra-sonically cleaned? ( or an overnight in bi-carb or ketchup etc)

    if you haven't, Id definitely do that before anything else else, as its just about certain one or both will have growths within, and even if they aren't the total cause of the poor running, I'd bet my house that they will be contributory as a minimum.

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    Should Get Out More Julian_Boolean's Avatar
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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Aren't SB200s single carb and the X5 had twin carbs.

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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    Quote Originally Posted by Julian_Boolean View Post
    Aren't SB200s single carb and the X5 had twin carbs.
    The SB and X5 both had twin carbs- maybe you're thinking of the Honda CD185/CM200s of same era? - they had a single carb IIRC

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    Should Get Out More Julian_Boolean's Avatar
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    Default Re: 1980 Suzuki SB200 - first run in 20 years

    No I'm just plain wrong, I honestly thought the SB was single carb, if they'rethe same carbs as my GT185 had good luck, they used to need constant float height adjustment otherwise it holed the right hand piston.

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