Adjusting the timing on 1987 yamaha warrior 350

SOURCE: 2001 yamaha warrior valve adjustment

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.

SOURCE: How do I adjust the valves on my 2003 Yamaha Warrior YFM 350X?

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.

SOURCE: My yamaha 350 warrior, and it wont start, Do i

adjustment of valve reasonably simple, remove tappet covers, remove small bung from mag cover top and rotate engine until you are able to see a capital T on the flywheel, providing whist you rotated engine it was on the correct stroke the inlet valve should have just closed when you saw the T. this is the correct stroke. loosen tappets lock nuts, adjust the tappets so you can just move it with your fingers, if your want to get technical the clearances between tappet and valve should be about .05mm

SOURCE: my yamaha warrior 350 has gas and spark but wont start.

check your timing as described if it checks out ok. you might want to check the intake valves and exhaust valves. intake 4 and exhaust 6
could have a bent valve.

SOURCE: on a 1999 yamaha warrior 350 the timing chain

NO!!! Goodness no. You may want to pick up a manual for it there will be a procedure particular to that bike on how to take up the slack in the timing chain. Usually it's a matter of loosening a few bolts while running and then tightening but you'll have to check. Oh, and by the way the longer you wait the greater the rick of the valves hitting the pistons.