PThe best plug is prob the standand or a pltuimum plug ngk
The spark plug gap for a 1994 Yamaha YZ250 should be .024 inches. A Yamaha YZ250 is a 249cc motorcycle.
The proper spark plug gap for a 2002 Yamaha YZ250 is .024 inches. New spark plugs usually come pre-gapped, however.
it should be between .7 mm to 0.8mm use a filler guage to ensure the gap correctly
The suggested spark plug gap on a 1997 Yamaha YZ 80 is .036. That is the standard gap for most Yamaha small engines.
.5 / .6
the gap is 0.024
NGK BR9EG is the correct plug for a 2001 Yamaha YZ 125
Most spark plug gaps are very similar from the point of view of sufficiency. The thickness of your thumb nail will suffice. Not tight though.
1982-87 yz 490 - ngk br8es - 0.024 " , 1988-90 yz490 - 0.032 "
Try www.bikebandit.com, they have a large selection of oem and aftermarket spark plugs, if you keep fouling plugs try to rejet the carb, or swith to a hotter spark plug.
Use 40:1 and run a BR9EG spark plug.
Yes, a YZ 250 is a 2 stroke, a YZ 250F is a 4 stroke.