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Rectifier Replacement

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GC888 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Topic: Rectifier Replacement
    Posted: 14 Jan 2019 at 17:21
Anybody switched the original out for a more recent unit with any success?

If so which was used and is it still working?

Thanks

G
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dan_s View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dan_s Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2019 at 18:10
Replaced the original one with similar new one about 3 years ago
Works fine
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2019 at 22:16
Originally posted by GC888 GC888 wrote:

Anybody switched the original out for a more recent unit with any success?

Just confirm you are talking about the Bosch unit. We don't know without you saying.
Brian.

Better 5 minutes late in this world than years early in the next.
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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2019 at 23:27
if Bosch rectifiers are available but rarely fail reg if the big tin one there are variable solid state ones that fit onto oem bracket and plug into loom ..... available from Towzatronics or i believe Gutsibits
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GC888 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2019 at 18:11
Originally posted by dan_s dan_s wrote:

Replaced the original one with similar new one about 3 years ago
Works fine

Yes that the one - was hoping someone had tried something less errm 'agricultural' ?

I was swapping it out on the basis of size not reliability, it works fine.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2019 at 19:22
You can get three phase rectifiers much cheaper.
But you need three extra small diodes to power the rotor windings.

You can also get the rectifiers made for car alternators, much smaller than the original Bosch one with all the connections you need, but you would have to sort out the wiring.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote trophydave Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2019 at 20:51
My V50 is fitted with an Electrex Rectifier/regulator,I think its an RR45.It was fitted by a previous owner and seems to work ok.
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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2019 at 10:05
The Bosch rectifiers may look large but they are still used on marine engines and generators as they are pretty bulletproof, the best upgrade is to replace the reg as the older one is limited it will not deal with AGM batteries the simple swap to variable VReg gives you the option to inc charge voltage to cope ....I discussed this thoroughly with a auto electrician prior to a full rewire .... Having also had more modern bikes where the reg rect failed on 3 of them.... The Bosch rectifier has been rock solid for the 30 yrs i have owned my V1000 ... it is used alot .... the other best upgrades by far are modern mini relays and bases with blade fuses make big difference to the volts drop ..... 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dennis menace Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2019 at 14:03
I use the electrex world one with no problems, it replaces the regulator and rectifier. I did use a direct feed from the fuse box to the regulator and beefed up the gauge of that wire.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2019 at 11:02
Thanks all :-) 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dinsdale Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2019 at 14:34
If you replace with anything other than a MOSFET rec/reg it's a wasted exercise.  This bloke ( http://roadstercycle.com/ ) sells kits with the Shindengen FH020AA rec/reg, which is what I have.  Fitting the FH020AA isn't difficult and the performance is outstanding.  If you haven't heard of "Shindengen" they are the industry standard for rec/regs.  MOSFET units are far more efficient and reliable.  You'll get a rock solid 14.4v from not far above idle right through.  On my V7iii (which has a ridiculously tiny electrical output) I have picked about 25 extra watts, simply by the efficiency of the MOSFET circuitry.  The MOSFET r/r remains cool to touch, whereas the old ones become too hot to touch.  All that heat energy becomes electrical energy.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 07 Feb 2019 at 22:22
I'm sure, on bikes like the V7 III, with a permanent magnet alternator and a rectifier/regulator as one unit, they may well be the best thing since sliced bread. However, it won't help on a V50 with a Bosch excited rotor magnet and seperate 3 phase rectifier and regulator..

Yes he does sell an alternative solid state rectifier (these are available elsewhere too), but he then suggests buying a 1975 Dodge regulator. No ignition warning light circuit included either.
Brian.

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