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Spark Plug Cross reference 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

My "X" plugs were DENSO from the factory and look like this.....



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."


Questions? Contact Chet at Chet says 'Be sure to write!'Chetspages@rattlebars.com

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