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Thread: Honda 250 es/sx owners. interest in high compression piston

  1. #16
    Join Date
    Oct 2007
    Location
    Grosse Tete, LA
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    3,439
    I'm curious, how does a piston change equate a 5hp difference in power?

    the 250 is what, 16hp or so at the crank (and I'd say I'm being generous considering what the trx300 puts out)? so a piston is supposed to give you an additional 33%
    increase in power?

    is the four valve head swap possible? that would see some power....

    I also say the 386 kit I suggested would crunch the sx gear box... I've seen it crunch the 300s and the trikes are likely built lighter
    Feedback thread: http://www.3wheelerworldforums.com/s...ad.php?t=78535

    Patiently waiting..

  2. #17
    Join Date
    Sep 2019
    Location
    Syracuse, NY
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    4
    Did anything ever come of this??
    '85 200X - Basket case, bought as a pair for $300. Winter project?
    '85 250SX Survivor - Only changed rear tires and air filter.
    '85 250SX Mudder - 27" Tires, Snorkel, Disc Brakes, 200X Front
    '86 250ES - Old workhorse. Bought running and driving for $125

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