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  1. #1

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    May 2014
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    Denmark
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    Ultra 150 crank repair.

    Hi guys.

    Does anybody know the procedure to rebuild the Ultra 150 crank.?

    Special tools needed?

    Is it pressed together?

    And how do you set it 120 degrees apart ? is it splined ?

    And no i'm not going to do it myself, i just want to know


  2. #2
    SplishSplash's Avatar
    Join Date
    May 2006
    Location
    Belle River Ont Canada
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    98
    Does anybody know the procedure to rebuild the Ultra 150 crank.?
    Not exactly, its a not something a "home mechanic" can do, needs a specialized shop that has all tools and gauges

    Special tools needed?
    Yes, for sure, getting it apart and back together without damage require special tools

    Is it pressed together?
    Yes, a very precision piece, would need a very good, accurate press.

    And how do you set it 120 degrees apart ? is it splined ?
    No, its not splined, a very common practice is to have it degreed and welded to prevent any movement of it (mine is) and I run a 1350 cc kit.

    And no i'm not going to do it myself, i just want to know

    You want a shop that specializes in rebuilding 2 stroke cranks for sure.

  3. #3
    it can be done
    but normally takes specialized jigs and precise measuring equipment.
    and yes a good press too.
    I check them before disassembly,scribe them and recheck upon assembly
    For the time it takes its better to let the experts do it.
    A degree wheel and dial indicator can be used to phase them

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