The member photo gallery is now integrated and live!!  All user albums and pictures have been ported from old gallery.


To register send an e-mail to admin@bmwr65.org and provide your location and desired user name.

Author Topic: Rewiring Lighting Circuits V65 Guzzi  (Read 1182 times)

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Rewiring Lighting Circuits V65 Guzzi
« on: October 28, 2015, 10:12:21 PM »
The handle bar switches on the Guzzi gave up in July this year, parked the bike, as the heat was too much for me with the amount of work involved .
No OEM switches are available and the aftermarket combination circuit switches would not fit onto the handle bars, they are like clip-ons, but are factory original .
Finally got done with it today, third day of work .
The job took too long, due to the wire colors on the bike and wiring diagram didn't match !!!! >:(
I added three switches to the left hand side of the small fairing, one for tail light and indicator internal lighting, and one each for head light low beam and high beam .
The original wiring on the switches was way too small for the job they had to do .
With the original switches, I would get a 3 volt drop on the bikes voltmeter when the tail light and indicator lights were turned on .
Now, about at best, a needles width of movement when the switch is turned on .
Put the headlights on a relay circuit, where the bikes headlight circuits activate the relays and you get battery direct voltage, on larger gauge wires .
Head lights seem brighter, but have not had the bike out when it's dark .
« Last Edit: November 01, 2015, 01:16:57 PM by Bob_Roller »
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Ed Miller

  • Posts: 2425
Re: Rewiring Lighting Circuits V65 Guzzi
« Reply #1 on: November 02, 2015, 01:23:34 PM »
Are the bars an odd diameter?  

I lucked out with my Triumph (back in the late 80s) and found a turn signal/hi-lo/horn switch from a Yamaha or something, and got everything to work.  My bike didn't have turn signals originally so that's why I did all this.  I later saw the same model switch on a Vincent, I thought that was funny.

Ed Miller
'81 r65
Falls City, OR

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Rewiring Lighting Circuits V65 Guzzi
« Reply #2 on: November 02, 2015, 02:45:19 PM »
No Ed, the bars make a 90 degree turn about an inch from the control ' perches ' no room to fit the after market combination switches .

The instrument cluster is a  two piece triangular shaped rubber housing and it is almost up against the control perches on both sides .

This seemed to be the least complicated way to go, if it wasn't for the wire colors not matching, I could have had this done in a day .

I had to  separate the connectors  and trace all of the circuits, add to that, the wire colors changed at the connectors !!!

Finishing everything on the Guzzi today, putting the high output regulator from Motorrad Electric back in, swapped it out with the regulator from the '81 R65, had some charging light issues on the Guzzi, it's got the same Bosch charging system the airheads do, so I can swap parts to do troubleshooting, but I think I may have corrected this with the larger wires I installed, I'll know the first time I ride at night . ;D
« Last Edit: November 02, 2015, 05:19:40 PM by Bob_Roller »
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Rewiring Lighting Circuits V65 Guzzi
« Reply #3 on: November 19, 2015, 02:46:38 PM »
Got the Guzzi out for a 3 hour ride today .
Perfect weather, 73 F, 23 C, clear sunny and 12% humidity .
At highway speeds, 75 mph, 125 kph, 4700 rpm, with low and high beams on and the tail lights and instrument lighting on, 170 watt lighting load, 13.7 volts, lights off, 14.2 volts .
At idle with that load, 12.5 volts .
I think I have the charging system about as good as it's going to get .
« Last Edit: November 19, 2015, 02:48:34 PM by Bob_Roller »
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline nhmaf

  • Global Moderator
  • *****
  • Posts: 5152
  • Free at last, Free at last!
Re: Rewiring Lighting Circuits V65 Guzzi
« Reply #4 on: December 12, 2015, 06:34:00 PM »
Sounds like an accomplishment Bob!   I wonder if the higher output alternators for the airheads also fit the small block Guzzis?
Airhead #12178 ? BMWMOA #123173 ?BMWRA #33525 ?GSBMWR #563 ?1982 BMW R65LS ?1978 BMW R100/7 1998 Kawasaki Concours

Offline Tony Smith

  • Posts: 2274
  • Graduate, Wallace and Gromit School of Engineering
Re: Rewiring Lighting Circuits V65 Guzzi
« Reply #5 on: December 12, 2015, 06:47:20 PM »
Quote
Sounds like an accomplishment Bob!   I wonder if the higher output alternators for the airheads also fit the small block Guzzis?


They do - with exactly the same caveat - they are not worth dick
1978 R100RS| 1981 R100RS (JPS) | 1984 R65 | 1992 KLE500 | 2002 R1150GSA |