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Buell Forum » 1125R Superbike Board » Stator/Voltage Regulator/Charging System subforum » SH847 location « Previous Next »

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Wesbronco
Posted on Tuesday, July 25, 2017 - 05:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Has anyone put the SH847 voltage regulator in the stock position, or is behind the license plate/by the radiator, the two popular places to put it?

I tried looking up the operating temps on this, but came up empty.
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Araignee
Posted on Wednesday, July 26, 2017 - 12:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I put the SH847 in the stock position on my 2009 1125R. Use the google search on the forum website, and you'll likely find a brief summary of what I did.

I've got about 1K miles on the machine since I made the modification, and it never gets beyond warm even in hard riding on 90 degree days. Feels ambient most of the time.

Takes a bit of finesse to ensure clearances and airflow and proper heatsink/ground connections, but nearly invisible when complete and trouble free. Roadstercycle.com is a great source of parts and advice.

I have never understood why an electrical component should be mounted where it is subject to vibration, rain and rock spray, and is poorly grounded and/or heatsinked.

(Message edited by araignee on July 26, 2017)
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Jmoreno88
Posted on Wednesday, July 26, 2017 - 06:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Put mine in the stock location on my CR, removed the original mounting plate. Tight fit but have had no problems with it and gets plenty of airflow
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Wesbronco
Posted on Wednesday, July 26, 2017 - 12:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I don't think there are any operating temp specs on this site, at least none that I've found. I searched Shindengen's site and googled for datasheets and found none. Closest I found gave a thermal shutdown temp of 150 degC. Just be nice to know before I put it there.

It fits perfectly by the license plate, and its not like I'm doing wheelies any time soon, but I don't see how that is a very safe area for such an important device. Though you can get to it super easy.
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Wesbronco
Posted on Monday, July 31, 2017 - 04:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I had to alter the plastic splash guard casing to get it to fit.





However, my question now is: What do I do with this wire?





Seems as though the old VR connected to it. I thought I could just attach my new VR to the battery, but it seems the old VR went off in a different direction. Do I solder the old end on to my new VR?
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Panshovevo
Posted on Monday, July 31, 2017 - 06:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Seems like you should be able to wire the new VR directly to the battery, but there was a recent post where a guy had wired his 847 direct, and was getting high voltage readings.
He wired it to that plug, and the problem went away, last I heard.
If there is more to the story, I'd love to hear about it, as I have an SH 847 waiting to be installed on my '09 CR as soon as I get the motor back together and in the bike.
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Wesbronco
Posted on Monday, July 31, 2017 - 06:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I bought this from Roadstercycle so it came ready to connect direct to battery post.

I just wanted to confirm that I wasn't bypassing anything that needed power by leaving the old VR plug unused. The old plug disappears into the wrappings and into the fusebox(?). I assume it connects to the battery post from there, but just wanted to hear from other members.

thanks.
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Joe7bros
Posted on Monday, July 31, 2017 - 07:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Wired mine direct to battery, no problem. Also, mounted the V/R to the tail tidy, behind the license plate; also no problem.
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Wesbronco
Posted on Tuesday, August 01, 2017 - 12:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Joe7bros, I thought about that, but couldn't bring myself to put it behind the license plate due to common ground concerns.

I know a motorcycle doesn't have speakers, so its not like I will hear any whining noises, and I don't see a lot of people complaining about voltage drops, or charging issues, but I couldn't find any spot on my license plate holder that was remotely connected to ground.

I felt more comfortable with the chassis of a voltage regulator connected ground, so that was the final reason I put it in the original spot. Considering I haven't seen a lot of other issues from people with it behind the license plate, its just one of those things.

(Message edited by wesbronco on August 01, 2017)
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