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Snowtard
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2,587 Posts
Discussion Starter · #1 ·
I know this sounds pretty dumb....can plugs with lots of miles on them loose performance?? 3900 miles on them to be exact...

2005 600 HO
Cudney Kit
Reduced Gear
96 Studs
 

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ITs WINTER!
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7,500 Posts
If their misfiring yes, other than that the loss would be unnoticable.

Spark plugs are something you should change every once in a while bud, its called maintenance
 

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123 Posts
When you change them, compare them to the new plugs. You will probably see that some of the surfaces have become slightly rounded.

3900 miles that is great. I can remember when I couldn't get 39 miles.
 
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