Will a yz 125 rear fender fit on a yamaha dt 125

SOURCE: 04 Yamaha Yz 125- Rear brake Master cylinder

Are you bleeding it by gravity (flowing down from resevior thru caliper) or forcing the fluid up thru the caliper to the resevior. The latter will get more air out in less time. Simple cheap pump kits are available at you auto dealer and u can use it on your other vehicles.

SOURCE: yamaha yz 125 1994

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SOURCE: yamaha DT 125 2003 Main beam headlight keeps

i have well, had a very similar problem, my headlight kept going on my 1990 dt125r from 1990 to 2003 the engine is the same so i feel it may be the same fix, the regulator/rectifier stopped working properly and was alowying to much power to get to the headlight and blew it, i got a new regulator/rectifier for around £30 ish, you could tell when it went caus the higher you reved it the brighter the light got until it blew not like when it gets brighter from tickover, it was just proggesive and just kept getting brighter the more you revved it, hope this helps

SOURCE: how do i decode yamaha yz 125 engin id number

You don't decode it. It is only a production run series number. Mororcycles are like cars in that respect. It is the frame number, AKA the "VIN number", is what carries all the information. Call a dealer with the frame number and he can tell you year, paint color, specific model and more. They may have a problem if the bike is too old. Yamaha changed to a newer code system a few years back.
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SOURCE: yz 125 water pump seal

GET A SMALL SCREW DIVER IN BETWEEN THE SHAFT AND SEAL PRY IT OUT WITH OUT DAMAGING THE SHAFT THEN USE A SOCKET FROM A TOOL KIT THAT FITS PERFECTLY AROUND THE EDGE OF THE NEW SEAL TO HAMMER IT BACK IN