Spark Plugs for the VTX

Spark Plug X-Reference for the VTX
GAP 1.0 - 1.1 mm (.038 - .043 in) - 14mm Gasketed 0.750 reach 0.625 hex PROJ TIP

MANUFACTURER	HOT	OEM	COLD
NGK^*	IFR5L11	IFR6L11	IFR7L11
DENSO^*	VK16PRZ11	VK20PRZ11	VK22PRZ11
NGK Platinum	BKR5 EIX-11	BKR6 EIX-11	BKR7 EIX-11
Denso		PK20PR11
Bosch Platinum+4	4419	4418	4417
Champion Double Platinum		RC10PYP4
Champion		7346
SplitFire Triple Platinum		TP392D
AC Delco		FR1LS
^{*from factory can have either DENSO VK20PRZ11 or NGK IFR6L11 as OEM Thanks to Paul from the}^VTXOA^{for this list}

Bosch 4418 Platinum +4 plugs with about 1,000 miles on them. Note that two plugs are relatively clean on
the electrode while two are not. This is due to the "waste" fire system which fires one postitvely and one
negatively. Unfortunately, these plugs came to me un-indexed so there is no way to tell which plug
was where on the bike so we cannot determine which was "clean" and which was "dirty."