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DT125R FORUM

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  4. oil fouled spark plug

oil fouled spark plug

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  • DTleeD Offline
    DTleeD Offline
    DTlee
    wrote on last edited by
    #1

    hello all,

    im completely new to motorbikes and have just brought my first being a DT125R 2001 French import with 5000 miles on the clock. have been taking it to bits and putting it back together to get an understanding of them as im pretty technically minded. However i did notice the spark plug was pretty oil fouled. im a bit of a perfectionist and want it running perfectly befre i start with anything else, at the moment its completely standard with no mods. where would you start with finding the route of the problem on this?

    thanks in advance

    lee

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

      Hello and welcome.

      The DTR is a two cycle engine.

      By this it means it will burn oil as part of the combustion process.

      Using the right plug, the right oil and the right fuel will really help with this.

      So make sure you are using autolube appropriate oils along with a decent fuel. A bit of an oily plug is nothing to worry about. It's well known two strokes foul plugs as part of their nature. But the road going DTR shouldn't do that.

      So unless you're at the point where plugs are failing, it's not something to worry about as it's just part of their nature.

      Always Originate, Never Pirate!

      DTleeD 1 Reply Last reply
      0
      • CalumC Calum

        Hello and welcome.

        The DTR is a two cycle engine.

        By this it means it will burn oil as part of the combustion process.

        Using the right plug, the right oil and the right fuel will really help with this.

        So make sure you are using autolube appropriate oils along with a decent fuel. A bit of an oily plug is nothing to worry about. It's well known two strokes foul plugs as part of their nature. But the road going DTR shouldn't do that.

        So unless you're at the point where plugs are failing, it's not something to worry about as it's just part of their nature.

        DTleeD Offline
        DTleeD Offline
        DTlee
        wrote on last edited by
        #3

        @Calum cheers calum, fuel and oil is as it should be and ive just orderd a new spark plug so will see how it goes. i only looked at it as it was running a bit smokey. i dont know if its something to do with it hardly being used but hopefully ill get a chance when this lockdown is over!

        cheers

        markus.wM 1 Reply Last reply
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        • CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #4

          Smoke is expected, it's a two stroke, it burns oil by design.

          Always Originate, Never Pirate!

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          • DTleeD DTlee

            @Calum cheers calum, fuel and oil is as it should be and ive just orderd a new spark plug so will see how it goes. i only looked at it as it was running a bit smokey. i dont know if its something to do with it hardly being used but hopefully ill get a chance when this lockdown is over!

            cheers

            markus.wM Offline
            markus.wM Offline
            markus.w
            wrote on last edited by
            #5

            @DTlee as @Calum explained the 2 stroke engine in mixes 2 stroke oil with the petrol so it's expected that it will smoke a bit, if you feel it's smoking a little too much have you used a cheap 2 stroke oil because there is available with some of the better quality oils 'low smoke oil'. Hope this is of some help to you.

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            • DTleeD Offline
              DTleeD Offline
              DTlee
              wrote on last edited by
              #6

              Cheers Marcus. Currently using yamalube, it does seem A bit too smokey but I’ll See how it goes after a bit more riding.

              Cheers

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              • CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #7

                Should smoke a wee bit from cold. Then clear up.

                Always Originate, Never Pirate!

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