2000 Yamaha DT 125 R Logo
Posted on Apr 11, 2010

HOW TO ADJUST POWER VALVE ON MY 1991 DTR 125 - 2000 Yamaha DT 125 R

5 Related Answers

tombones

  • 3567 Answers
  • Posted on Mar 18, 2009

SOURCE: losing power in last gear

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.

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Anonymous

  • 3600 Answers
  • Posted on Jul 21, 2009

SOURCE: Need a second hand barrel for DTR 125

you can get it here http://www.surdykeyamaha.com/pages/catalogs/search/U2t1U3RhcnRzOjIwMDMgWWFtYWhhIFlaIDEyNS4uLiAgc3RvY2sgYmFycmVs/1/search.aspx

Anonymous

  • 921 Answers
  • Posted on Sep 14, 2009

SOURCE: how mutch fork oil do i put in the forks on my

Use graduated measuring bowls and remember RELAESE pressure first before doing thisl...then crack open the drain scews and messure amount..this will ball park it. use 10 weight oil to replace. dont put more that a couple pounds of air backin the shocks they dont need nuch more then 4-6 psi. if you us ea gas station to inflate only squirk for as second then measure you might blow the seals..remeber very little air.

scottbullett

  • 139 Answers
  • Posted on Oct 25, 2009

SOURCE: how to adjust or upgrade power valve for 93 nsr

remove the lower faring on the right side on the cylinder you will see the cables going to the vavle remove the cover you will see the marks on the pully and on the case adjust the cables to align the marks and away you go

m22loud

  • 136 Answers
  • Posted on Apr 26, 2010

SOURCE: do i turn my power valve clockwise or

if you are turning to open up the valve for more power then you are making a mistake. power valves open the upper exhaust ports to allow the exhaust gas to exit faster being pulled by the exhaust pulses from the expansion chamber. by opening it and setting it in the fully open position would rob the engine of all its low down power making the bike useless below 5000 rpm which is where your power valve would start to open, it would also waste fuel as it would be sucked straight into the ex possible causing lean running conditions .

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My power valve on my dtr 125 is not turning properly and my bike is realy slow got new servo motor and still the same

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