Don,t use that plug clip hooked directly to the battery you will destroy your new plugs instantly. To use a 12 volt battery you must use a power panel or you could use a single cell pocket ignitor.

Your K&B 61 and all the sportsters will thrive on K&B glowbar 1.5 volt long plugs. Color of the plug has nothing to do with the plugs performance and is just an individual manufacturers markings.

John