Hi guys , some positive feedback , my 2009 WR450 just clocked 4000k and 140 hours, valve clearances no adjustment needed (right in middle of specs)
Changed fork oil, it looked brand new.
this bike is modified with YZ GYTR race pipe and carbie fully jetted to suit and runs a vortex ignition
it doesn't use a drop of oil and starts the instant I touch the starter every time.
What do I do ? air cleaner cleaned and oiled every ride, oil and filter changed every 10 hours with Yamalube full synthetic.
I run the bike on 98 octane and use an additive called Flash Lube Valve Saver I swear by this stuff
Moral of story, Yamalube is good stuff , keep your air filter clean and oiled, use a lead replacement addative like Flash Lube