So i changed out my plugs and noticed they were gapped at .030. Checked with the Harley Dealer that had the bike before me and they told me the bike had the screaming eagle intake & pipes put on and then had the carb rejetted. Just wondering if the gap .040 is what i should put them at or keep .030?

 

.30 is too little. Put them at .40

 

yep, I gap mine @ .038 to .040

 

Agreed. Re-gap them to .40

 

Dealer and indy shop told me to gap at 0.42

 

The official HD spec is between .038" - .043"

 

Got them at .040 now. Just kinda weird seeing the old plugs at .030

 

mfrs make sparkplugs with the same heatrange/thread length/etc.
in both standard , and wide gap. such as the -10 rating on NGK's= equal wide gap

example BR8HS standard gap, BR8HS-10 wide gap.