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DT125R FORUM

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  4. Top end rebuild.

Top end rebuild.

Scheduled Pinned Locked Moved Engine
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  • ? Offline
    ? Offline
    A Former User
    wrote on last edited by
    #1

    Hi, since i think one of my issue is a blown gasket, and that i will need to do it at some point anyway i figure ill ask.

    Engine run fine cold, then when warm i had a fast idle (air leak). I replace the crank seal on the magneto side.

    Start the engine. still does it, at that point i tought it ight be the powervalve, since they didnt work for a long time, figure oring or seal might be going bad.

    I didnt change anything, fully put the bike together for safety (all plastic, seat, wiring, reflector etc...)

    Filled up the radiator, since seem really low... since now start... it does sound like it wants to but no go.

    now i'm thinking that i might just have a blown head gasket, since that could explain the air leak and the missing coulant. Gonna investigate more before i do anything.

    Now, how hard is it to change Piston/Ring/Gasket et PV oring on a DT200? and where to get the part from?

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    • ? Offline
      ? Offline
      A Former User
      wrote on last edited by
      #2

      Just called the local dealer.

      Piston/Ring/Pin 157CAD
      Gasket Kit 98$ CAD

      which isnt too bad.

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      • Louis-DT-WRL Offline
        Louis-DT-WRL Offline
        Louis-DT-WR
        wrote on last edited by
        #3

        Most parts can be found on eBay, even genuine items at a good price

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        • ZrakoZ Offline
          ZrakoZ Offline
          Zrako
          wrote on last edited by
          #4

          Check your thermostat mate

          1979 Jawa Mustang 50
          2003 Gilera DNA 125 R.I.P
          2015 Keeway TX 125 SM
          2006 Yamaha DT 125 X

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