2002 Yamaha WR426F
Good for fun trail rides. Just add gas
Cooling impeller was worn when I got it, engine oil and coolant mix.
Metal pipe to the water pump had a "hair crack" and was losing water.
Electric generator was impossible to take out; damaged the crankshaft while trying (finally got it out).
An excellent 4t enduro.
Dual camshafts and 5 titanium valves. 5 gears. Low cost and easy maintenance. Can handle a great deal of punishment from amateur or young riders.
The water pump impeller shaft gets worn out after 200 hours. Replace it, along with seals and bearing.
The valves are made out of titanium and are very expensive (all 5 of them). You can cheaply replace them with steel ones from the YZF 400, but you will need to replace the springs as well (heavier valves need stronger springs).
Valve clearance needs to be checked often (every 30 hours), because they are very expensive and go bust without much warning. You will know that the time has come, when cold starting gets a bit more difficult.
Oil needs to be changed every 20 hours in fun/weekend/trail ride mode.
5th gear and 2nd gear shifting arm gets easily worn, and needs an engine tear down to fix.
The seating position is a bit high, but it is good for handling.
Not much else is needed. Just add gasoline and ride, but just remember to change the oil and check the valves.
At least the exhaust camshaft to an automatic one (Hot Cams or from an OEM 450 model). Makes starting much, much easier.
Exhaust (really anything is better, but the FMF system I had was excellent and quiet).
Lower the final drive gears to 14/52 (from 14/48 original). You lose some top speed (will pull about 130Km/h), but the bike will be able to handle any terrain, and you can wheelie even in 5th gear with no effort.
Upgrade camshafts with Hot Cams and valve springs with Kibblewhite kit.
Change the rear fender. It is ugly. Use a stock YZF fender with some LED lights.
Change the rear spring with a harder one. OEM gets easily soft.
Hold tight. The bike tends to wheelie rather than slide (provided you have good suspension) even in wet grass.
Would you buy another motorcycle from this manufacturer? Yes
Review Date: 21st December, 2011