Identifying charging system
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Intermediate
Joined: Apr 2023
Posts: 38
Likes: 9
From: Houston , Tx.
Identifying charging system
Hello All, Still pretty new here. Been looking around for a thread to figure out how to I.D. the charging system on a 1975 FLH. I know it was upgraded but , don't know to what? According to my brother it was for a 1980 80" FLH , not sure of the amp rating. The stator is a two pin female at the case and male at the reg./rect. harness. I see all kind of ways to check the stator but , have not figured a way to bench test the reg./rect. assy. ! Since I have the primary torn down I was trying to address the charging system. Debating on replacing or upgrading since the bike has been sitting since the mid 90's. ANY IDEAS OR INPUT FROM SOME OF YOU GRAY BEARDS OUT THERE? Thanx in advance for any of your help! Tommy
Cruiser
Joined: Mar 2017
Posts: 224
Likes: 118
From: Kentucky
If you think its oem and don't have any manuals you could try googling Carl Salter manuals check under Harley Davidson. You can look at the manuals or download them for free and compare what you have.
Club Member
Joined: Mar 2009
Posts: 66,110
Likes: 51,396
From: Niles Canyon Ca.
Regulator plug look like the two pins on the left in the picture or the three in the middle ones ? Left is the late shovel 22amp charging system, the middle is the later 32amp upgrade setup.
Club Member
Joined: Mar 2009
Posts: 66,110
Likes: 51,396
From: Niles Canyon Ca.
Youtube is loaded with vids on how to test the charging system on shovels.
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Intermediate
Joined: Apr 2023
Posts: 38
Likes: 9
From: Houston , Tx.
Yea , I have the basics stored in my old pea brain somewhere , plus manuals. My kids turned me on to You Tube on my smart TV so I
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Road Master
Joined: May 2012
Posts: 1,161
Likes: 653
From: Potter County, PA
The ones on the left are what was O.E.M. from mid 1970's to somewhere in the early 1980's. My 1984 O.E.M. is the opposite. That gives you the era. You don't need super high amperage. Cycle Electric is my go to brand. I hear rotors are pretty hard to find across the board. I put a used Cycle Electric Regulator / Rectifier and Stator from a 22 amp system (from my 1984) along with a stock rotor (1977) from a 16 amp system and it has worked just fine. As long as the Regulator and stator plugs match up is what you want more than anything; a 1980 FLH doesn't need more than 22 amps.