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what powerband does the XS run?

Discussion in 'The Garage' started by stillwater, Jun 30, 2021.

  1. stillwater

    stillwater XS400 Member

    Looking to do a lot of mods to my '79 XS400-2.
    To go turbo, N2O, cam, etc. I need to know what powerband the bike runs in Stock form, and what powerband I may expect from a modded bike..

    Suggestions?
    :umm:
     
  2. stillwater

    stillwater XS400 Member

    Anyone know what the powerband is for a stock '79 XS 400-2 ??
    Guess I could call Crower, they're gonna grind me a midrange power Cam for it.

    Was hoping someone here may know...
     
  3. Jasonsblue81

    Jasonsblue81 colorado Kid

    thats a shame. looks like a nice stock bike
     
  4. stillwater

    stillwater XS400 Member

    The pic is of a bike just like mine, when it was in good condition. Mine needs considerable work.
    Trying to get some helpful info about what I want to do with mine. :pimp:
     
  5. xschris

    xschris XS400 Guru Top Contributor

    10,407
    509
    163
    NY
    No real numbers on a sohc xs400s' power curve but most ran (u.s.)23lbs torque max and 38hp max. or so average over all model years. A good stock setup bike will have the best overall performance. Making mods unless you have access to a dyno and real performance parts, which no one makes for these, will only hurt overall performance and reliability that these were engineered for.
     

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