Many bike owners find it easier to take it to a mechanic to get their valve adjusted. However, it is possible to do it yourself. You must set your engine at TDC on the compression stroke. You do this by inserting a small screwdriver in the spark plug hole. You will then be able to access the valve you need.
What is the spark plug gap setting for a 1987 yamaha big bear
With the engine at TOP DEAD CENTER (TDC) Adjust the exhuast valve to .007 and the intake to .005.
You set cam timing on a Yamaha big bear 350 4x4, by opening up the bike chassis and looking for the cam timing levers. You can adjust it up or down until you have it set to how you want it.
Mukini
YFM 350SE Big Bear 4x49725x8x1225x10x12
The Yamaha 350 raptor is the same thing as a Yamaha warrior just with liquid cooling the motors still basically all the same the valve setting on my 2000 warrior are .004 on intake and .006 on exhaust
gap for my 1995 big bear 350 is 0.6-0.7 mm or .024-.028 in.
1998
4 gallons
Probibly needs a valve job.
4 on the intake and 8 on the exhaust
2 quarts