2005 Yamaha DT 125 X Logo
Posted on Mar 18, 2009
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Losing power in last gear

Im losing power in last gear on my dtr 125 can u help

  • richardowens Mar 22, 2009

    its got the standerd sprockets on and a tuned after market exhaust and still losing power in last gear.

  • Anonymous Dec 15, 2012

    im getting the same problem all gears seem fine but 6th it just pretty much dies ive a dep exhaust on it and the sprokets are standered any luck with urs yet#

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1 Answer

tombones

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  • Master 3,567 Answers
  • Posted on Mar 18, 2009
tombones
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If all other gears are doing okay then I would check with your local dealers parts department and ask the number of teeth on the counter sprocket and on the rear sprocket on a stock dtr 250. The prior owner may have mounted a larger counter sprocket and / or a smaller rear sprocket on the bike. The drive ratio may be out of range such that the engine is trying to make for a really high top speed but just doesn't have the strength to do it.

Please rate this solution. Thanks.

  • tombones Mar 25, 2009

    Try a ride down the street without the exhaust pipe hooked up.

    Sometimes the inside of the pipe partially collapses and could mess up the harmonics designed into the cones.



    Please comment on the result.

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