3 replies [Last post]
312Icarus's picture
Joined: 07/15/2016
Posts: 409

On my ‘68 r50US I’m only getting ~6.8 volts at the battery at ~3000 rpm with the headlight off. Riding for a couple of hours with the headlight on, the battery voltage drops to ~5.8 vdc. The generator has new brushes and puts out over 7 volts testing it.

I’ve cleaned the contact points on the regulator to no avail. I’m wondering (absent a new regulator) what I should consider tweeting?


Daves79x's picture
VBMWMO #9030
Joined: 08/09/2015
Posts: 348
I Read

I read everything about adjusting these regulators that I could find when I was having a similar problem on my R50. There was a lot to wade through, but unless I was missing the golden nugget - nowhere did anyone actually describe exactly what and how much to adjust on the stock regulator. I gave up and got a modern electronic one and haven't looked back.




schrader7032's picture
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6788
In the summer 2013 VBMWMO

In the summer 2013 VBMWMO magazine, there was a discussion of a /2 mechanical regulator. I'm not near the article, but my thought is that the features of the regulator and how to adjust it were provided. Could be wrong...


Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Twocams's picture
VBMWMO #8750
Joined: 03/16/2014
Posts: 707
On Duane Ausherman web site

On Duane Ausherman web site he talks about how to adjust the /2 Bosch regulator. What the points gaps should be etc.

twocams https://w6rec.com/bosch-voltage-regulator-adjustment/


69 R69S
92 R100RT
2004 Aprilia Atlantic 500cc Scooter

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