Excessive clutch drag?



  • Hi!
    I have a rather annoying problem with my '95 DT 125 R - whenever I want to ride it, and it have stand still in more than a day, the clutch is completely locked the first time I to put it into gear, the gearbox makes a nasty "bang" and the engine dies - most times, this unsticks the clutch and I can fire it up again, and start riding. However, it always seems that the clutch drags quite a lot, it's hard to find neutral etc. I run Castrol POWER1 10W30 in the gearbox.
    I don't think it's an ajustment issue as I did this as explained in the Haynes manual when I rebuild the engine last winter, and the clutch plates looked almost as good as new, but I guess i'll have to try and replace them - so my question is, will it suffice to just get the friction plates, or do you always change the steel plates too? Or maybe someone have a suggestion to another solution to my problem?



  • Try a different oil bud.

    Or adjust the push rod on the clutch basket to make it disengage easier.



  • The arm that pushes the clutch rod can get worn at the end and cause similar problems even with the clutch adjusted properly



  • Mine does this, a sticky clutch, and my dads Yanaha Fazer 600 did it too, with the Fazer he just put it in first, held the clutch in and rocked it back and fourth until it freed up. Was a pretty simple fix. But harder with my DT as it has 1 cylinder instead of 4, doing the same method turns the engine over, it'll still work but take abit longer. If I haven't ridden mine for abit I just get the revs up abit while in the garden before slowly releasing the clutch



  • @Calum said in Excessive clutch drag?:

    Try a different oil bud.

    Or adjust the push rod on the clutch basket to make it disengage easier.

    Thought about changing the oil, any recommendations?

    @yammad said in Excessive clutch drag?:

    The arm that pushes the clutch rod can get worn at the end and cause similar problems even with the clutch adjusted properly

    Don't think it's the case either, I was very thorough when I had the engine restored, everything was like, or almost like new - but thanks, i'll check it if nothing else helps.

    @Burridge said in Excessive clutch drag?:

    Mine does this, a sticky clutch, and my dads Yanaha Fazer 600 did it too, with the Fazer he just put it in first, held the clutch in and rocked it back and fourth until it freed up. Was a pretty simple fix. But harder with my DT as it has 1 cylinder instead of 4, doing the same method turns the engine over, it'll still work but take abit longer. If I haven't ridden mine for abit I just get the revs up abit while in the garden before slowly releasing the clutch

    Yeah, I found a couple of ways to unstick the clutch, but it just annoys me alot, i've owned quite a few bikes, and never stumbled across this problem before. But thanks for the input 🙂



  • @MDN91 I was trying to find the stuff I use. Problem is its so shit they don't sell it online. It's Castrol 5 30 part synthetic. Never had any issues.

    But have had massive issues with their magnetic stuff.



  • @Calum
    Well, that's interesting - i'll look it up now, are you sure it's 5W30? The manual says 10W30. I use the power1 on my roadbike (FZ6), that's why I chose that to start with..



  • Not entirely sure, all I know is the magnetic stuff just slipped all the time. Semi synthetic is plenty for such underpowered engines. The difference between the two weights is not noticeabke oon the dt



  • Could also be grroves in the clutchbasket. They can be sanded smooth again.



  • Mine did this too when I bought it. I drained the oil in it and used rock oil lite lightweight gear oil and it slowly stopped doing it.