Voltage regulator

[MemphisChopper]

I owe ya big time..thanks... Il give it a shot!

 

[dogvet]

What voltage regulators work on BD

I've done regulator testing with Compfire, Thunderheart, H-D, Crane, and the production regulator and they all work fine. None have drawn more than 30 amps even with a variable carbon pile load applied to the battery drawing 1/2 of the cold cranking amp rating.

One thing that I found interesting was that by adding star washers between the regulator and frame (like Harley does), you actually increase the charge rate at low rpm. Adding the 40 amp fuse is a good idea (but you should make sure you have a spare fuse handy. It's a big sucker and I doubt if they are readily available anywhere but a BD dealer!
:zz2cents:

 

[P8RIOT]

I've done regulator testing with Compfire, Thunderheart, H-D, Crane, and the production regulator and they all work fine. None have drawn more than 30 amps even with a variable carbon pile load applied to the battery drawing 1/2 of the cold cranking amp rating.

Interesting test setup, dogvet - nice to see some real data! :up:

 

[V]

The fuse is a 40 amp as noted. I checked and they have them in stock at Autozone here in Va in the 40 amp as well as other ratings. Seems to be readily available locally

But if you do blow a fuse are you going to install another with out checking the cause


Thanks V

 

[dogvet]

The fuse is a 40 amp as noted. I checked and they have them in stock at Autozone here in Va in the 40 amp as well as other ratings. Seems to be readily available locally

But if you do blow a fuse are you going to install another with out checking the cause


Thanks V

If you blow the fuse, chances are that you just toasted your regulator! The fuse goes there to protect the bike from surges from the regulator, the only things in line with it are the regulator and the alternator. The fuse is supposed to react to a surge faster than the mechanical breaker. The surge can take out your EHC (ride over). Put a couple of star washers under the new one and get back on the super slab...shiny side up of course!:zz2cents:

 

[Gas Man]

One thing that I found interesting was that by adding star washers between the regulator and frame (like Harley does), you actually increase the charge rate at low rpm. Adding the 40 amp fuse is a good idea (but you should make sure you have a spare fuse handy. It's a big sucker and I doubt if they are readily available anywhere but a BD dealer!
:zz2cents:

But as Dave noticed this weekend that although my VR is bolted directly to the mount, his has some spacers between the VR and the front motor mount.

 

[dogvet]

But as Dave noticed this weekend that although my VR is bolted directly to the mount, his has some spacers between the VR and the front motor mount.


Star washers are still a good thing because they dig thru the chrome on the regulator (which can be a crappy hi current conductor) and sometimes not all of the powder coating gets removed around the regulator / front engine mount portion of the frame which can ultimately result in a poor ground for the regulator. Again, I'm no expert, just passin on some personal experiences and observations.

:zz2cents:

 

[Gas Man]

Well most of us have polished front motor mounts.

Mine was just chromed, but I know my frame mounts are clean and raw.

I have to hit the hardware again tomry... maybe I'll pick up a couple star washers... cant hurt right?