plug gap confusion
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Cruiser
Joined: Dec 2008
Posts: 172
Likes: 0
From: Iowa
plug gap confusion
ok, the service manual for my bike says the gap on the plugs should be .038-.043, and the service manual for the S&S super b carb says it should be
.022-.025. which one do I go by?
.022-.025. which one do I go by?
Cruiser
Joined: Nov 2008
Posts: 167
Likes: 3
Gap has some to do with the type of plug, but mostly it has to do with the
type of ignition.
Around 0.40 sounds about right for an electronic ignition.
Points are a little tighter but not much, maybe around 0.35 to 0.38 - I don't
have a bike with points though so don't trust my numbers!!
And a magneto has the tightest gap at approx. 0.20.
The carb type has no relevance to the plug gap... so I'd trust your service
manual, if you have a stock ignition setup, or go find the ignition manual if
you have after market. And 0.22 to 0.25 doesn't sound right for anything.
AFAIK
Gazza
type of ignition.
Around 0.40 sounds about right for an electronic ignition.
Points are a little tighter but not much, maybe around 0.35 to 0.38 - I don't
have a bike with points though so don't trust my numbers!!
And a magneto has the tightest gap at approx. 0.20.
The carb type has no relevance to the plug gap... so I'd trust your service
manual, if you have a stock ignition setup, or go find the ignition manual if
you have after market. And 0.22 to 0.25 doesn't sound right for anything.
AFAIK
Gazza
Tourer
Joined: Sep 2008
Posts: 297
Likes: 5
From: Rockford Illinois
go with .040 personally i'd go with the service manual
check out the ironhead section over on xlforums as well, lots of good info between these two sites http://xlforum.net/vbportal/forums/forumdisplay.php?f=7
http://www.nightrider.com/biketech/hdsparkplugs01.htm
http://www.mrgasket.com/pdf/Sparkplugs.pdf
check out the ironhead section over on xlforums as well, lots of good info between these two sites http://xlforum.net/vbportal/forums/forumdisplay.php?f=7
http://www.nightrider.com/biketech/hdsparkplugs01.htm
http://www.mrgasket.com/pdf/Sparkplugs.pdf
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