1994-1995 Yamaha FX700 (FX1) Service Manual, Page 46Get this manual
IIANOSJP I
ELECTRICAL SYSTEM INSPECTION
4Inspect: Spark plug type Incorrect7 Replace
Standard spark plug:
NGK BBHS NGK BRBHS
(Noise suppresser type)
5Measure: Spark plug gap Out of specification7RegapUse wire gauge