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UPS drivers & their pickup trucks.
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<blockquote data-quote="Notretiredyet" data-source="post: 2122968" data-attributes="member: 44381"><p>Harley was forced into water cooling because of emissions standards. They ran them so lean to meet the standards there was not enough fuel to cool the valves. The first thing most do is enrich the fuel mixture the past few years, but the factory can't sell them that way so they water cool the heads to keep the valves from failing.</p></blockquote><p></p>
[QUOTE="Notretiredyet, post: 2122968, member: 44381"] Harley was forced into water cooling because of emissions standards. They ran them so lean to meet the standards there was not enough fuel to cool the valves. The first thing most do is enrich the fuel mixture the past few years, but the factory can't sell them that way so they water cool the heads to keep the valves from failing. [/QUOTE]
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