Question about 2003 Yamaha DT 125 R

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I keep loosing power at top end i get to 60mph in 5th gear and wont pull in 6th

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6th is a long legged gear. Never expect much from it.

Posted on Oct 04, 2009

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2011 Nomad 1700 lacks power in 6th gear especially in heavy wind or in mountains. Always shifting down to 5th to keep up. Only 33 mpg doing 70 mph. Improves to 39 MPG at 55. I had a 2003 1600 Classic...

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My honda cbr looses power in 5th and 6th gear

Hi there.
When in the upper gears, reduced power output from the engine becomes more noticeable in 5th and 6th gear due to the more direct drive created by the higher ratios. First thing I would do is put some additive in the fuel to clean the fuel system and decarbon the head and combustion chambers. I use a Nulon product, not sure what you can get in your part of the world. Techron is another good well known product that works. In fact, if you bike is affected by buildups any brand name cleaner additive will help with the problem.
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having the same problem... my car is an 03 as well... any solution yet? i flushed my tranny, put in synthetic, made sure the linkages were lubricated inside and outside the car, and still nothing.. theres no grinding, at all, its just really gummy

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