Owners manual for 2001 Yamaha YZ 250 - YZ 250 Yamaha Motorcycles

SOURCE: Year

Find the model production year, usually found on the same plate as the vin. Then add one year. For instance if the bike was produced in 2001, then its a 2002 model.

SOURCE: Oil

drain the fuel, locate the float bowl drain screw, lowest screw on the carb and loosen it to drain the carb. replace the fuel with proper pre-mix, replace the spark plug and it should be fine

SOURCE: front fork oil capacity

Hi
You can download the whole workshop service manual that has this info and heaps more from here. Hope this helps Thanks for using Fixya. 
regards robotek

SOURCE: 1993 yamaha yz 250 bareel damage

there's a company called Langcourt (www.langcourt.com) that specialize in barrel repair. i just had mine done there. i've also got a 1993 yz 250 stripped for parts if you're interested in anything else, unfortunatly i've already sold the barrel.

SOURCE: where can i download a free manual for a yamaha yz 426

Clymer, or Hayes make them, but a good one is the factory version from Yamaha. Maybe used from e-bay, but a dealer will have it.