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Re: Spark plug change....
I change spark plug each year, no matter what the health of spark plug is. Earlier than that can't say would make a differance. And for air filter every two years. It also depends how much you run. I commute every day.
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“God creates out of nothing. Wonderful you say. Yes, to be sure, but he does what is still more wonderful: he makes saints out of sinners.”
“People understand me so poorly that they don't even understand my complaint about them not understanding me.” --- Søren Kierkegaard ---
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