Correct Plug and Gap for 77 Ironhead
05-27-2013, 08:38 PM
Join Date: May 2013
Location: San Antonio
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Correct Plug and Gap for 77 Ironhead
Looking for the best plug and gap for a 1977 Sportster Ironhead. Seen lots of conflicting things. The HD dealer said 4R5. Please help. Thanks.
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