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Old 07-11-2014, 07:24 PM   #1
ML WYDELL OP
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Joined: Apr 2009
Location: Looking for fuel
Oddometer: 477
Electrical parts cross reference

Does anybody have cross reference info on starter relays and voltage regulators? Looked through Tips / Tricks but didn't see anything.

Recently went on a good long ride. Was gone for a bit and then the bike would not start. Hit the key and the tach needle would go back / forth?? Had lights, blinkers etc. but no start. Checked everything with multi-meter twice. Battery had 12 volts??? Then did a load test with the multi meter and the battery dropped to 8 volts! 4 year old Deka battery.

New battery, vroooom, like the day I parked it. Duracell AGM
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Old 07-11-2014, 07:37 PM   #2
disston
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Location: Silver Spring, Md
Oddometer: 8,793
Battery needs a minimum of 12.5 to start.
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Old 07-13-2014, 08:19 PM   #3
bpeckm
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Joined: Apr 2008
Location: Road Island
Oddometer: 5,731
A couple of resources on IBMWR:

Airhead Tech Articles

BMW Part Substitutes

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Old 07-14-2014, 06:16 AM   #4
ML WYDELL OP
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Joined: Apr 2009
Location: Looking for fuel
Oddometer: 477
Cool. Thanks.

Found the euro style fuses for the headlight bucket at advanced, by Bussman I think.

Found a generic relay for the starter as well. Going to wire in a in-line mini fuse holder and have it outside the headlight bucket so its easier to check.
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Old 07-14-2014, 06:48 AM   #5
bpeckm
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Don't know what battery and harness you have, but on my bike I did what you said above: I put in an inline "main" fuse, which then goes to the fuse panel (R80ST, which doesn't have the fuses in the bucket), and then on to relays, etc. Works great, with easy troubleshooting (if and when I need it!).



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XS650 becomes a VT BackRoadRunner
Loving the 80ST
I love projects that take twice as much effort as should be needed. Should be an Airhead motto. (disston)
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Old 07-15-2014, 07:58 AM   #6
ML WYDELL OP
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Joined: Apr 2009
Location: Looking for fuel
Oddometer: 477
Work is being done on a 78 R80. Just wanting to simplify the electronics.

Currently running points which I just adjusted, now she's hauling ass.

Considered going to electronic but if it's not broke don't fix it.

DURAGM-30LA-US Duracell Ultra is the battery I just went to, Batteries Plus.

Also looking at putting the ignition some place else as well.
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