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CVO Technical => Twin Cam => Topic started by: Z10 on November 06, 2011, 08:48:11 PM
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Was at the local dealer yesterday with a friend and picked up a set of plugs. Haven't pulled them since I got the bike in May. Pulled the boot and saw Autolites installed. 5/8 sparkplug socket too small. Hmmmmm 11/16 to remove them..that's a first. Installed HD 32192-10. The Autolites are P# 4164. Is this a common plug for a 2006 103?
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Common plug. I used to run them in my evos.
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One small detail to pay attention to when using that plug with the 11/16" hex. If you mount head bolt bridges the socket won't go in to remove the spark plugs. You'll have to remove the bridges every time you want to change plugs.
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...............and on engines that carry at/near 190-200 psi ccp, at least here with the NGK's we use, and a couple other shops that tune, have witnessed a tick more power if the gap is snugged up to .035". :)
Scott
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I use 4163 plugs in my 103 set @ .035.
Al
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On our Pro Heads I ship the NGK plugs DCPR8E with shims.