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Old 01-25-2013, 12:35 AM   #31
chasbmw
Beastly Adventurer
 
Joined: Feb 2006
Location: Bath Uk
Oddometer: 1,787
If your airhead is dual plugged, use a hotter running plug in the lower position, because the hotter running plug will help burn off the oil etc that tends to end up on the lower plug, so with NGKs I might use a '7' in the top and a '6' on the bottom.
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Charles
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R90s 1070 replica, R90/6
1971 Commando Fastback
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