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Old 08-01-2009, 06:30 AM   #1 (permalink)
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spark plugs
need some help as to what spark plugs to run in 1978 low rider.Thanks
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Old 08-01-2009, 11:45 AM   #2 (permalink)
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why a long reach plug when threads in the head are short?
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Old 08-07-2009, 06:25 AM   #3 (permalink)
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They screwed around with extended reach/tip plugs as well.
Electrode was hanging out about 5/16".
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Old 09-01-2009, 01:37 PM   #4 (permalink)
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Quote:
Originally Posted by harley_fixer View Post
why a long reach plug when threads in the head are short?
You must have a 74", my 1978-1/2 FLH 80" Classic takes the long reach plugs.
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Old 09-01-2009, 06:10 PM   #5 (permalink)
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a '78 uses long plugs. if you have short plug heads they're not original.
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Old 10-27-2009, 09:04 PM   #6 (permalink)
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Any how if you have a short reach head,,,DON'T run long reach,,,have seen the threads carbon up and mess up threads in head when removing..I run NGK BPR5ES,,,I believe the#s could have changed..
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