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PostPosted: Sun Oct 26, 2014 6:49 am 
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Still in the Driveway

Joined: Sun Oct 26, 2014 6:36 am
Posts: 1
Country: Uk
Bikes owned: rv125 rv125 vanvan 3of gsr 750 gsr 600 gs550
Hi new to this forum I have an rv125 trying to get the headlamp to work all other electrics work also is this sposed to be 6 volt negative earth or positive earth anybody got wireing diagram with colour codes on thanks dogrough


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PostPosted: Sun Oct 26, 2014 8:51 am 
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Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3441
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Wiring diagram for a 77 RV125 is here: http://www.suzuki2strokes.com/forum/viewtopic.php?f=29&t=4743

Your 1972 RV125 is likely somewhat different than shown in the 1977 wiring diagram.

I may have found a wiring diagram for an earlier RV125 in this tread on another forum:
http://www.2strokeworld.com/forum/index.php?topic=20322.0
The diagram is: Image

The earlier diagram shows a different ignition switch & no voltage regulator.
It shows that a resistor is used as a substitute load when the lights are off.
Would seem reasonable that the early RV125 did not have a voltage regulator & the later models did.

Both wiring diagram show a mixed AC/DC design with a half-wave rectifier.
Some components run on DC & others run on AC.
The AC powered components are only powered when the engine is running.

The headlight runs on AC -- so you need to check it with the engine running.

The flat-bottom headlights are hard to find & are getting quite expensive.
Your bike probably doesn't have a voltage regulator.
So its worth considering using a cheap alternative headlight while you are making sure everything is good.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


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