This A7TC spark plug is for the Baja Wilderness 90 (WD90) ATV. In addition, this spark plug also fits many 50cc, 70cc, 90, 100cc, 110cc, 125cc, and 150cc engines.
The NGK CR7HSA spark plug is a resistor type plug,
#12 on Diagram - DPR7EA-9 spark plug for 4-stroke Full-size engines.
The NGK BP6ES spark plug is a medium heat, projected firing tip, "short-reach" unit that works especially well on the Genuine Buddy 50 and other Genuine Scooter Company 50cc models.
Specification: 135 degree angle steel Cap with rubber bushing 5k ohm resistance