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#100414 - 09/11/06 2:45 am Re: Rectifiers and Batteries  
Joined: Oct 2003
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RF Whatley Offline
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RF Whatley  Offline
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Just keep those beers comming! beerchug

laughing


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
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#100415 - 09/11/06 4:20 am Re: Rectifiers and Batteries  
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BrianFromOz Offline
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NSW Australia
g g g g g g g g


"What are you rebelling against?
What have you got?"

77 T140V

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#100416 - 09/11/06 4:33 am Re: Rectifiers and Batteries  
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BrianFromOz Offline
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BrianFromOz  Offline
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NSW Australia
beerchug


laugh

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What have you got?"

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#100417 - 09/11/06 2:23 pm Re: Rectifiers and Batteries  
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ClassicGlory Offline
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ClassicGlory  Offline
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Posts: 164
Wessex, England.
Bonnie John,

I'm not sure why the MC manufacturers suddenly all went -ve earth although I did hear that car manufacturers found that +ve earth was causing the cars to rust quicker through some electo-chemical reaction, maybe MC's did it just to ensure that the electrical parts suppliers could produce similar parts at no extra cost.
Nowadays however some additional parts and upgrades may not work unless you have a -ve earth system, although most will if you isolate them and run seperate supply and return wires.
I tend to change my bikes over to -e if I fully rewire as I find it easier to think that way, having been bought up on modern cars and japanese bikes.

Regards

ClassicGlory.


Regards

Chris - chris@classicglory.com

www.classicglory.com
Dedicated to Sunbeam S7 & S8 Motorcycles.
#100418 - 09/11/06 2:43 pm Re: Rectifiers and Batteries  
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ClassicGlory Offline
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ClassicGlory  Offline
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BrianFromOz,

I agree with a lot of what SBoyd and RF Whatley say, although I feel that little of what's been said misses the point of my article.
Firstly I also hate the positioning of your unit, mine are usually fitted on the rear mudguard or onder the battery tray out of sight. There may also be variations on these units... the two I currently have available for testing have earthed heatsinks and therefore I recommend isolation on +ve earth installations, althought they might not ALL be like that I prefer to recommend safety.
SBoyd beat me to it on recommending finding out how your system is wired and he was spot on.
As for size, there are smaller units available but how much current can they handle and are they 3 phase.... my article was aimed at 3 phase installations only and I run my units on 180-240w capable systems, although I hope I never draw anything like that! :-)
Your installation sounds like a bodge and I would recommend paying the 50UKP equiv. and getting a 3 phase stator as this is all you'd need to change to make things work properly other than taking RF's advise and moving the cylinder head wire to a better more common ground.
I would not leave the 2 phase alternator trying to run the 3 phase RR... one has to go, and the advantage lies with changing the alternator rather than the RR in my opinion.

I think this covers everything, but I can be contacted off the forum at sunbeam1950@yahoo.co.uk should you have further questions.


Regards

Chris - chris@classicglory.com

www.classicglory.com
Dedicated to Sunbeam S7 & S8 Motorcycles.
#100419 - 09/12/06 12:32 am Re: Rectifiers and Batteries  
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BrianFromOz Offline
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BrianFromOz  Offline
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Posts: 706
NSW Australia
Thanx Chris....the unit has been removed already...and yes i was tossing up whether to replace it or go 3 phase and the money would be better spent improving the output....ive already started on the wiring etc and ill be mounting the rectifier on the mudguard under the battery tray...i guess the PO didnt want to pull half the bike apart to get at this area.....
can the stator just be changed and use the same rotor?
thanks again for the great answers....i knew very little about the bike electrics beforehand.... bigt
beerchug


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#100420 - 09/12/06 2:59 pm Re: Rectifiers and Batteries  
Joined: Aug 2006
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BrianFromOz Offline
BritBike Forum member
BrianFromOz  Offline
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Joined: Aug 2006
Posts: 706
NSW Australia




"What are you rebelling against?
What have you got?"

77 T140V

Is Your Bike Here?
MembersBikesBritBikeForum
http://s165.photobucket.com/albums/u51/MembersBikesBritBikeForum/
#100421 - 09/12/06 4:03 pm Re: Rectifiers and Batteries  
Joined: Sep 2004
Posts: 164
ClassicGlory Offline
BritBike Forum member
ClassicGlory  Offline
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Joined: Sep 2004
Posts: 164
Wessex, England.
Thats better and is exactly where mine is located.
The front looks so much better also.

Best of luck.

CG.


Regards

Chris - chris@classicglory.com

www.classicglory.com
Dedicated to Sunbeam S7 & S8 Motorcycles.
#100422 - 09/12/06 4:46 pm Re: Rectifiers and Batteries  
Joined: Oct 2003
Posts: 11,108
RF Whatley Offline
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RF Whatley  Offline
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Joined: Oct 2003
Posts: 11,108
North Georgia, USA
Quote:
Originally posted by ClassicGlory:
I'm not sure why the MC manufacturers suddenly all went -ve earth
Probably the same fate as RH shift.... US DOT regulations. "If you intend to sell your product in the largest market in the world, then you WILL do this..."

You'd be surprised what they regulate to standardize things for the US.... blinker rates, bumper heights, headlamp brightness, fuel requirements, tail lamp area, lamp lens colors, etc.

bigt


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA

"Shop Boy" at Rodi British Bikes
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