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Thread: checking spark plugs
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09-08-2009, 08:33 AM #1
checking spark plugs
pulled a TR55 plug today after 8k miles to have a look...
edges are still sharp and whatnot, I gapped them at .055 and is still holding that gap pretty much
also, how long do the copper TR55's last? it's basically a stock motor
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09-08-2009, 07:37 PM #2
Plugs should be good for 50,000 miles and those look fine.
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