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  #1 (permalink)  
Old 04-06-2005, 10:52 AM
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Location: tulsa, ok
Bike Year, Make, Engine: 03 pyo chopper s&s 111
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spark plugs

hey all-question about what spark plugs you use.Am currently using champion ra8hc but looking at the s&s lit i got with my motor they recommend rn12yc.Motor is a 111"ss+ w/crane hi-4 ignition.s&s lit also says to use ignition manufactures recomended spark plug but couldn't find anything from crane.Looked at champion site and the closest motor i could find was 107" s&s for Big Dog.Not in a quandry or anything about which plug to use but was just curious about what you use on large ci s&s motors.Hope this is not a repeat thread.
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Old 04-06-2005, 11:09 AM
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Bike Year, Make, Engine: 2001, Big Dog, Mastiff:107
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Here's a chart, etc. I have the SS 107 and have been told by most that the Autolite is best. (http://www.nightrider.com/biketech/hdsparkplugs.htm)
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Old 04-06-2005, 11:34 AM
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sparks

I WOULD DEFINATLEY PUT THE RN 12yc PLUGS BACK IN, IF YOU ARE STAYING WITH CHAMPION.
I have talked with dozens of mechanics an performance people over the years and they all have their favorite brand-it's like beer, coors light is better than bud light.
Since there are so many opinions and options on plugs-I just picked a good brand (with correct heat range etc.) and change them every season. 2 cents
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