Yamaha dt125re rebuild



  • Wasn’t that long ago I head the skimmed and new gasket carnt see any visible leakage from bottom of the head top of barrel, I can see the odd drip coming from the hose where it connect to the head from the radiator.

    But will be replacing the head gasket anyways done it plenty of times so it’s an easy enough job

    But thanks for reply mate



  • @bradt You won't be able to see any visible leakage as it will be leaking internally - the coolant will be draining into the combustion chamber



  • I'd say head gasket. Can only use Athena or genuine head gasket on these engines. Other copies fail.



  • Iv only ever used Athena gasket for my rebuilds

    Iv emailed pjme for a quote on rebore re skim and new piston to fit just in case the worse

    Going to re do the gasket over weekend and see how things go



  • Hi does anyone know what size the studs should be for the exhaust ?

    Sitting on the bike , the right hand stud / bolt the threads are stripped does anyone know what size it should be because at the minute I’m only getting a m14 to fit but the other side is a m12

    Does anyone know how deep how wide it should be thanks ?



  • M8 on my bike lol. When you say M12 or M14 do you mean the spanner size?



  • Yeah M8 on mine too, my last cylinder had one M8 and the other drilled and tapped to M10, I'm guessing these alloy threads are easy to strip.



  • I’m taking it round to me mates tomorrow he’s gunna tap and thread it properly while I change the head gaskets



  • So today I got the head gasket sorted head not warped lucky enough got it all back together and back home for a wash and wax when the weather cooled down.

    https://i.imgur.com/XbDFqJ0.jpg
    https://i.imgur.com/Tuag8qw.jpg

    Now wanting to change the white out to back so as the months go by I’ll be changing a lot more going for a stealthy look withs Yamaha blue.

    Will keep more pictures uploaded 👍🏻



  • Looking really smart mate!


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