Suzuki VZ1500 Owner's Manual page 111

NGK DENSO
CR6E U20ESR-N
CR7E U22ESR-N
NOTE: If the above-named plugs are
not available, consult your authorized
Suzuki dealer.
REMARKS
Standard
If the standard plug is
apt to overheat, replace
with this plug.
NOTE: This motorcycle uses resistor-
type spark plug to avoid jamming elec-
tronic parts. Improper spark plug selec-
tion may cause electronic interference
with your motorcycle's ignition system,
resulting in motorcycle performance
problems. Use only the recommended
spark plugs.
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