idle speed change
idle speed change
Outstanding HDF Member
Joined: Jan 2007
Posts: 3,438
Likes: 3
From: Chesterfield, VA
If you are wanting to change it because you feel it is too high or too fast, leave it alone. The newer bikes depend on 900-1000 rpms for the electronics and proper lubing of the upper end of the motor.
Supporter
Joined: Jan 2007
Posts: 15,788
Likes: 5,621
From: along the shore of Mishigami
+1 with jmpancoast, the 1000 rpm is two fold 1) maintains a proper charge rate for the electrics on the bike i.e. headlight always on, fuel pump always on and engine electrics, 2) oil pressure is low on idle with the twin cams, the bottom end bearings also take a beating if you decide to lower the rpm.
Road Master
Joined: Jul 2005
Posts: 916
Likes: 3
From: Mauldin, SC
You buy some tuning software and an ECM interface. You can go down to 800 and up to 1200 at operating temperature with SE Race Tuner on the '06.
Elite HDF Member
Joined: Apr 2008
Posts: 4,718
Likes: 11
From: Back in the Good Ole USA. South Carolina to be exact.
Guess I'm the dissenting opinion here. My 94 Low Rider (carburated) idled at 750 rpm. Never had any charging problems at all. I'm pretty certain that that electrical system on my 08 FXDF is superior, granted it also has to support the EFI but just how long would you have to sit idling at 800 rpm to kill the battery? Never been an issue for me. I've also heard the story about the oil pressure, again I'm skeptical. Lots of miles on my 94 FXDL iling at 750 rpm, and no problems. I'd like to see a bike w/an actual oil pressure gauge showing the op difference in the 200 rpm from 800 to 1000.
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Road Master
Joined: Jul 2005
Posts: 916
Likes: 3
From: Mauldin, SC
The question was "how do you change the idle speed on 06 dyna",
not "should you change the idle speed on 06 dyna".
not "should you change the idle speed on 06 dyna".
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Guess I'm the dissenting opinion here. My 94 Low Rider (carburated) idled at 750 rpm. Never had any charging problems at all. I'm pretty certain that that electrical system on my 08 FXDF is superior, granted it also has to support the EFI but just how long would you have to sit idling at 800 rpm to kill the battery? Never been an issue for me. I've also heard the story about the oil pressure, again I'm skeptical. Lots of miles on my 94 FXDL iling at 750 rpm, and no problems. I'd like to see a bike w/an actual oil pressure gauge showing the op difference in the 200 rpm from 800 to 1000.
Now the oil pressure argument has more merit to me for the newer (07 and up) bikes but I'm not buying it on the '06s like mine. The 06 models you could get either carbed or EFI. I seriously doubt there are two different oil pumps that go into that engine depending on whether its carbed or EFI. If I'm all wet, please let me know.
Oh BTW, to answer the OP, you need a tuner(SERT, PCIII, etc.) to be able to lower idle speed.
Tourer
Joined: Mar 2009
Posts: 493
Likes: 0
From: Newfoundland, Canada
I'd like to go a little lower on the rpm....