NGK Plug DPR8EA9
on the motor lol
0.031 to 0.035"
No, you do not have to .....
part #: NGKDPR8EA-9
Spark Plug fouling is pretty common.
.030-.040
.035
.30 to .35
From the 98-01 service manual - .03-.04 inch (.8-.9mm)
.028 to .032 .028 to .032
The 2004 Viper Yamaha spark plug gap is .018. Most spark plugs will be pre-gapped by the spark plug manufacturer.