Try asking for NGK part # 3252. The days of using the "real" number code for spark plugs is gone(no one is smart enough for that system)...... You'll still pay 10 bucks a plug, but no shipping cost.
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MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600