you need to clean ur carb use fresh gas and clean ur tank and shut off valve
twist the top of the choke, there is no idle screw on the 1999 yz250
By turning the idle adjustment screw located near the choke lever under the carburetor. Counter-clockwise lowers it, clockwise raises it.
A dead battery would cause an 89 YZ250 not to start. Another reason it might not start is because it is out of gas.
It should maybe a minor adjustment needed.
I am fairly sure the fork style changed... I would not take the chance if possible
A YZ250 is much faster than a CRF250r. The YZ250 is a 2 stroke where as the CRF250r is a four stroke.
check your air idle control valve
87 Yamaha YZ250
Stock it would be in the 45-47hp range.
It could be the throttle position sensor or the idle air control valve.
Selling a 1997 yz250 really depends on the condition it is in and the person selling it. Most 1997 yz250 usually sell for around a thousand dollars and lower.
my 96 dodge Dakota wont idle when engine is warm and i changed idle air controle valve what else could be wrong