20 Most Recent 2001 Yamaha WR 426 F Questions & Answers

http://www.motorcyclenews.com/MCN/bikereviews/searchresults/Bike-Reviews/Yamaha/Yamaha-TRX850-1996-2000-/?&R=EPI-239 says 45 check this bud

This bike does not come with a factory horn.

The serial number is stamped on the right side of the steering head pipe

Fuel filter is integrated into the fuel cock attached to the fuel tank.

It usually holds 0.8 lit and owners just put a liter on it!
Did u drain ur oil when u have cold engine?
U should heat up ur engine first before draining it!
hope that might help ya!

Try this link for a online repair manual;

i had a problem with it running hot on idle and went up 2 jet sizes from stock and it made a huge difference it also made the bike start better while hot i had to do a little tuning with that black knob you were referring to but it helped out a lot the next thing you can do is a high out put water pump or dual core radiators that will help out a lot.