One cylinder Road King
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Joined: Aug 2014
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From: Upstate NY
One cylinder Road King
Just picked up a 2001 Road King and the rear cylinder doesn't fire. Has good spark(new plug) and compression. Plug appears to be dry. Can there be fuel getting to the front cylinder but, not the rear cylinder? Only 7500 miles. Any ideas/help would be appreciated. thanks, gregjo1948
Last edited by gregjo1948; Dec 16, 2023 at 06:40 AM.
Seasoned HDF Member
Joined: Mar 2010
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From: Honah Lee
I would not think it's a M&M. I thought it was the Delphi EFI.
Stellar HDF Member
Joined: Oct 2015
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From: Puyallup, wa
2001 was M&M. 2002 was the first year of Delphi.
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Seasoned HDF Member
Joined: Sep 2008
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From: San Diego, CA
Just picked up a 2001 Road King and the rear cylinder doesn't fire. Has good spark(new plug) and compression. Plug appears to be dry. Can there be fuel getting to the front cylinder but, not the rear cylinder? Only 7500 miles. Any ideas/help would be appreciated. thanks, gregjo1948
As mentioned, we need more info..... It's hard diagnosing an issue via the internet. We don't know your knowledge/experience level, what has been done, and how it was done...
First, how did you verify the spark...? An inline spark tester? Or are you assuming good spark just because of a new plug?
Yes you can get only fuel to one cylinder if it's EFI.... Is the bike carbureted, or the Magnetti Marelli EFI system...?
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Seasoned HDF Member
Joined: Sep 2008
Posts: 14,160
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From: San Diego, CA
Delphi EFI started with the Softail models in 2001.
It was first used on the touring models in 2002..
It was first used on the touring models in 2002..
Grand HDF Member
Joined: Jul 2007
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From: Bates County MO
Common issue for that era, the wire harness going to the injectors was a bit tight, causing breakage inside the insulation. Easy repair, solder in a 1/2 wire extension @ the break. This eliminates the tight spot, and repairs the broken wire that caused the issue.