SOURCE: hi there i have a yamaha dtr 125
The bike is 19 years old. Caseings will be VERY hard to find. Suggestion; take the case to a welding shop and ask them to weld the crack. Teey will have a MIG or TIG welder which will do the job and the cost should only be about 20 bucks.
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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SOURCE: need wiring diagram for electric start yamaha dtr
Here's a link to the whole manual... good luck!!
http://www.ebooksquad.com/2009/02/21/2006-yamaha-dt-125rdt125x-owner-manual.html
SOURCE: can any 1 help i
Firstly, when riding this bike do not ride past the splutter, this could be for. Number of reasons, ignition breaking down, wrong grade of spark plug ,fuel air mixture as an event of worn or damaged crankshaft seals, cdi ignition moduel, coil, ht lead arking out,does this have the original exhaust? Maybe it needs re jetting, has this bike always behaved like this or did the fault develope slowly? the list goes on
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