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.
To change the resistor spark plug cap on your 2004 Yamaha YZ 250, first ensure the motorcycle is turned off and cool. Remove the existing cap by unscrewing it from the ignition coil wire. Then, attach the upgraded cap by screwing it onto the wire securely, making sure the connection is tight. Finally, replace the spark plug wire cover if necessary and ensure everything is properly seated before starting the bike.
.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.