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DT125R FORUM

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  4. full engine rebuild on dt 1990

full engine rebuild on dt 1990

Scheduled Pinned Locked Moved Engine
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  • jimmydc98J Offline
    jimmydc98J Offline
    jimmydc98
    wrote on last edited by
    #1

    i was asked by a mate who has a 1990 dt if i can do a full rebuild on a budget what stuff would you recommended bearing wise piston wise etc. he does like to rag her a bit and i don't want to dive into the engine until am sure that i have the correct parts. i tried turning the engine over it took more that usual but will wouldn't have none of starting wise this is why i recommended a full rebuild. Ive tried everything another carb from my bike, a new spark plug but no the top end doesn't look to bad i haven't got photo unfortunately but have worked on quiet a few bikes before with supervision of course but i still know my way around an engine is there any bearing kits etc

    DT200WR 1997 - New Project
    DTR 125 1997 - The Bike That Got Stolen
    DTR 125 2002 - Project
    DT 125 LC 1986 - Old Bike

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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      Gearbox bearings are 20 for Japanese Koyo. The mains are an odd size amd cost 50. Decent con rod is 50. Gasket kit is 30. Seals are 30. That's about it. You will want a flywheel puller and clutch holding tool.

      If the top end needs refreshing then add another few notes to sort that out.

      But it not starting may not be the result of a worn bottom end. Unless it is properly out of shape. That said it would be evidently clear if this was the case as it would sound incredibly rough.

      Always Originate, Never Pirate!

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      • jimmydc98J Offline
        jimmydc98J Offline
        jimmydc98
        wrote on last edited by jimmydc98
        #3

        it was constantly near 10 to 11k in each gear

        DT200WR 1997 - New Project
        DTR 125 1997 - The Bike That Got Stolen
        DTR 125 2002 - Project
        DT 125 LC 1986 - Old Bike

        CalumC 1 Reply Last reply
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        • jimmydc98J jimmydc98

          it was constantly near 10 to 11k in each gear

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #4

          @jimmydc98 Built to withstand it pal

          Always Originate, Never Pirate!

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          • M Offline
            M Offline
            mezzaaa
            wrote on last edited by
            #5

            Any chance you could give me a list off all the bottom end bearing codes desperate to find them

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            • AndyYamA Offline
              AndyYamA Offline
              AndyYam
              wrote on last edited by
              #6

              I know this is oldish but I assume you found the sticky at the top of this section.

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