Hello, I am looking for technical information about a Yamaha Warrior 350 model 2001. Valve clearance Cyl. head tightening torque

valve clearance is inlet .02mm hot. exhaust .025 mm hot cyl head torque is cyl head torque stage1 30-35nm stage2 60-70nm stage3 run engine for 15 minutes. stage 4 tighten further 70-75 nm

sounds like it could by the timing chain / chain tensioner
or you need to set the valve clearances if its tappy rather than rattly

valve clearance is .014 inch for intake and exhaust with engine warm.
head torque it 21 ftlbs, then 44 ftlbs, then loosen all, torque to 89 inchlbs, then to 21ftlbs, then mark and turn the bolts an additional 60 to 65 degrees.
cyl head sub bolts torque 80 to 100 inchlbs.
thanks.

had the same thing on my 350 the adjustment screw for the valves had backed out had to readjust them and replace lock nuts

it is a simple fix. you can get the specs from your local dealers parts person. and the valves are under two caps on the top of the jug. the caps have two small allen screws holding them on. just remove the caps, you will see the top of the valves, there is a small jam nut with the top of the adjuster sticking out. it has a small slot in it. loosen the jam nut, then check the clearance with feeler gauge. turn the center of the adjuster with the slot in it with a small flat screw driver to adjust the clearance. then tighten the jam nut. if you have any experience working on engines this will be a simple thing for you to do.

if your using the old bolts, 35 ft/lbs. if new bolts, 25 ft/lbs. that will work just fine.

first you need to remove everything that covers your valve covers(gas tank etc.) remove the intake valve cover,and the rotor nut and timing plug.set the engine a t.d.c.(top dead center)fit a socket onto the rotor nut and turn it counterclockwise until the"I" mark appears align it with the index mark in the timing hole.use a flat feeler gauge between the top of the valve and the adjuster.loosen the locknut and turn the adjuster just until you feel resistance on the feeler guage.hold the adjuster and tighten the lock nut down.i can not tell you the min.clearance spec to your quad since i have a 660 raptor.try using the smallest clearance number.

hello
with the cylinder set at top dead center compression. using a feeler gauge between the tappets and the valves there should be .002-.003in clearance on the intake valves, and .006-.007in. clearance on the exhaust valves. thank you.