74" Panhead magneato plugs - The Jockey Journal Board

Go Back   The Jockey Journal Board > General Discussion > The Board

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-05-2014, 12:02 PM   #1
jessee
Senior Member
 
Join Date: Dec 2010
Location: thunder bay, ontario, canada
Posts: 245
Default 74" Panhead magneato plugs

What kind of plugs can I use ??? I can't find auto lite or champion j12yc
jessee is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-05-2014, 06:19 PM   #2
old stale negative
Junior Member
 
Join Date: Feb 2014
Location: SFCA
Posts: 26
Default Re: 74" Panhead magneato plugs

hope this helps.

info is specific for XLCH Sportster, but applies to mags in general too…

my XLCH magneto cheat sheet:
- only use solid-core wires on a Harley with a magneto
- do not use resistor spark plugs or resistor spark plugs
- cracks in wires will drain spark, inspect carefully
- mag uses an open-ended double secondary lead coil, both plugs fire at the same time
- best points to run are Fairbanks Morse part# F-M B2437A or Morris Magneto P-5
- set mag points to 0.015"

Spark Plugs
Autolite AP4316; Champion H8 and H8C (H8C aka 587)
plug gap .020 (max) on the plugs (0.018-0.020)
points gap = .015 on the magneto points
plugs torque to 14ft/lbs; always use anti-seize on threads

plug type notes:
previously used on my 1966 XLCH = AC Delco C43L; Autolite XS85
Champion H8 and H8C = replaced the HD4, the OG, and most-reliable plug -- now unavailable
- DO NOT use HD4R it is a resistor plug
- Spark plug gaps on a magneto bike need to be small
old stale negative is offline   Reply With Quote
Old 06-05-2014, 08:46 PM   #3
LeftLane
Junior Member
 
Join Date: Feb 2013
Location: Charlotte NC
Posts: 23
Default Re: 74" Panhead magneato plugs

I got a set at my indy today. $2 each.
__________________
Drinking may cause memory loss. Or worse , memory loss.
42wla 51fl 56fl
LeftLane is offline   Reply With Quote
 
Old 06-06-2014, 07:19 AM   #4
ralphiejantz
Senior Member
 
Join Date: Dec 2008
Location: Long Island, NY
Posts: 1,321
Default Re: 74" Panhead magneato plugs

Quote:
Originally Posted by jessee View Post
What kind of plugs can I use ??? I can't find auto lite or champion j12yc
autolite 4275 for a panhead with a magneto
you can get them off ebay.
__________________
http://syndicatechoppers.com
www.visionarycycleproducts.com
authorized dealer for
Biltwell Inc
Lowbrow Customs
Buchanans Spoke and Rim
Wargasser Speed Shop
Universal Vintage Tires
Paughco
V-Twin MFG.
Fab Kevin
Colony Machine
Morris Magneto
Baker Drivetrain
Boyle Custom Moto Air Cleaners
Andrews
Cycle Electric
ralphiejantz is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -5. The time now is 11:34 AM.