The correct spark plug for this motorcycle is: NGK D8EA
The spark plug gap for a 1994 Yamaha YZ250 should be .024 inches. A Yamaha YZ250 is a 249cc motorcycle.
NGK BR9EG is the correct plug for a 2001 Yamaha YZ 125
NGK CR9E
B8es
The correct spark plug for this model is the NGK B-7ES.
What I s the correct spark plug gap for 2011 Yamaha 230 Dirt Bike.
1982-87 yz 490 - ngk br8es - 0.024 " , 1988-90 yz490 - 0.032 "
Ngk cr9e
.35
you have to make ngk b8hs-10
.030-.040
Correct plug and gap for YFM350X is : NGKD8EA 0.024 to 0.028 I own one, this info is out of the Yamaha Service Manual.