1999-2000 Bombardier Traxter ATV Factory Service Manual, Page 131Get this manual
Section 05 ELECTRICAL Subsection 05 (IGNITION SYSTEM)
NGK SPARK PLUG SYMBOL EXPLANATION
PREFIX SUFFIX WIDE GAP
Thread diameter Heat rating numbers
10: 1.0 mm (.040") 11: 1.1 mm (.044") 13: 1.3 mm (.050") 14: 1.4 mm (.055") 15: 1.5 mm (.060") 20: 2.0 mm (.080")
Firing end construction
18 mm 14 mm 10 mm 12 mm mm 12 mm 19 mm Reach
19 mm (34") Taper Seat 12.7 mm (12") 11.2 mm (716") 21 mm (5354")
A: B: C: G: GV: L: S: V: X: Y:
Special Design Single Ground Special Alloy Dual Ground Special Alloy Racing Type Racing Version of Type Half Heat Range Standard Center Electrode Fine Wire Center Electrode Booster Gap Grooved Center Electrode