Which Spark Plug should I Use? - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 5 (permalink) Old 12-13-2012, 09:39 AM Thread Starter
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Which Spark Plug should I Use?

Which spark plug should I use for my 02 RC51?
In the manual it should be IFR9H11 NGK in summer.(IFR8H11 in winter)

But some guys told me that maybe FR9BI-11 NGK is better.

Could any heart man share his idea for this, as my opinion, I think the one
in manual is best. But I still do not know specs of IFR9H11 NGK, it is appreciate that the specs. could be provided.

Looking forward your feedback.
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post #2 of 5 (permalink) Old 12-13-2012, 09:50 AM
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Quote:
Originally Posted by kenhe View Post
In the manual it should be IFR9H11 NGK in summer.(IFR8H11 in winter)


as my opinion, I think the one
in manual is best.
you answered your own question
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post #3 of 5 (permalink) Old 12-13-2012, 04:13 PM
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Just a different heat range AFAIK

Duct tape can't fix stupid...but it sure helps muffle the sound
'03 SP2, '09 GL1800
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post #4 of 5 (permalink) Old 12-13-2012, 06:56 PM
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Where are you located? If cold weather is a issue then you might go with 8h11. But I'll let you in on a secret. I ride in 5 Celsius in spring time ( for all you Americans, that's just above freezing ) and I run the 9h11 with no issues. Here's a guide that goes into more detail. http://www.dansmc.com/sparkplugs1.htm

Hope this helps
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post #5 of 5 (permalink) Old 12-27-2012, 04:07 PM
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