Question about 2004 Yamaha DT 125 R

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Hello, i have a yamaha dt 125 r motorcycle and I have a problem release the front chain gear because the whole engine turns while i am trying to remove the nut from the gear.W hat should i do?

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You could ask someone to hold the rear brake on, supposing the chain is still on the front and rear sprockets it will hold it still for you!

Posted on Jul 23, 2010

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THAT IS JUST LIKE MY DT 125, IT RUNS FINE WHEN THE CHOKE IS UP, BUT AS SOON AS THE CHOKE GOES DOWN THE BIKES GROGS DOWN AND CUTS OUT... ALSO IF I PUT PETROL DIRECTLY INTO THE CARB THE BIKE WORKS JUST FINE. DO I NEED TO CLEAN THE CARB ?? SOMEONE TOLD ME BECAUSE I HAVE A NEW DEP EXHAUST MAYBE I NEED A BIGGET JET. ??? HELP ME PLEASE LOL

Posted on May 28, 2010

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Did you try an impact driver? How about putting the bike in low gear? If not, just get a breaker bar on there an whack it with a brass hammer. I'm pretty sure it is a right hand thread. Hope this helps.

Posted on May 14, 2010

  • Ned  White
    Ned White May 28, 2010

    Yes, the new exhaust has upset the carb, you either need to re-jet, or open up the air, which you probably can't do, unless you can find one of those fancy air filters. The jet kits are finicky, they have to be just right or they won't run, If you can find a kit made by dyno-jet, get it. They are adjustable and work great. I had to re-jet my Ducati, and the factory specs wouldn't do a thing to it, so I found the dyno jet on ebay and it works great. So while you are in there, clean the whole thing and replace all the o-rings and gaskets that come with it, make sure you can get air through every hole. Hope this helps.

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