R75 not starting

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Matt-R75
Posts: 8
Joined: Sun Jul 01, 2012 11:09 pm

R75 not starting

Post by Matt-R75 »

Stopped to eat on my 73 r75 this evening and when leaving bike would not start. Headlights work fine but oil pressure/charge indicator lights don't come on when ignition switch is engaged. Nothing happens when starter switch is depressed. Too late to look at it tonight. My guess is something open in the ignition switch unless this circuit is fused somewhere?
Roy Gavin
Posts: 400
Joined: Tue Aug 03, 2010 11:21 pm
Location: Adelaide Australia

Re: R75 not starting

Post by Roy Gavin »

The stop light switch should live up when the ignition comes on, so if you run a jump lead from the battery positive to the live terminal on the switch that will bypass the switch , and eliminate one item.
Adelaide, Oz. 77 R75/7. 86 R80 G/S PD, 93 R100 GS, 70 BSA B44 VS ,BMW F650 Classic
Jean
Posts: 1100
Joined: Wed Aug 18, 2010 7:43 am

Re: R75 not starting

Post by Jean »

Check the large terminals at the battery...sometimes they break and just make contact wnough for lights but not enough for starter current.
This happened to me AND to someone else a year later at a rally...easy to fix IF you know to look for it.
Clemson, SC
R100s, R75/5
Duane Ausherman
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Joined: Thu Aug 12, 2010 12:39 pm
Location: Galt California
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Re: R75 not starting

Post by Duane Ausherman »

Jean wrote:Check the large terminals at the battery...sometimes they break and just make contact wnough for lights but not enough for starter current.
This happened to me AND to someone else a year later at a rally...easy to fix IF you know to look for it.
Actually quite common. When we found a bike with the starter not turnng, our first check was a battery terminal. Just reach down and tweak the lugs and often that is enough. However, it can be far more complicated.
Ask the Indians what happens when you don't control immigration.
Matt-R75
Posts: 8
Joined: Sun Jul 01, 2012 11:09 pm

Re: R75 not starting

Post by Matt-R75 »

terminals look good...I've got a rat's nest inside the headlamp that I am going through. I did find some skinned wires but nothing yet to cause the issue. Still probing.
Matt-R75
Posts: 8
Joined: Sun Jul 01, 2012 11:09 pm

Re: R75 not starting

Post by Matt-R75 »

turned out to be a short in the wiring which also blew a fuse in the starter circuit.

Thanks for the responses
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