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Discussion Starter #1 (Edited)
Bike has always ran fine no issues. Been parked 6 weeks, on battery tender, turned on ignition, fuel pump pressured system, pushed start button and only heard one "clik" from starter relay switch. Thed startern nothing, checked all the settings; neutral, side stand up, battery fully charged, run switch on, all fuses ok, WTH? Voltage at; battery, both 30A fuses, starter relay switch. Ground at battery, and starter relay switch.
All ideas welcome, I am not looking forward to ringing out the harnes!!!
willy
2000 #169
 

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How old is the battery btw ?

It's possible that the battery might indicate a "good" 12 volts prior to hitting the starter but it isn't actually healthy enough to start the bike.

Got a spare battery handy that you can jump start the bike with by chance ? If not, try hooking up the terminals to your car's battery for a jump (but leave the car engine OFF/NOT running) when doing so...
 

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Discussion Starter #3
with ignition on, no lights, no horn, nothing. Separated plug/harness going to ignition switch, no voltage.
willy
 

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There should be no live to an ignition switch, if an RC51 is like most older bikes... Try changing the battery. They can die after some years even if a battery tender is used...
 

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Discussion Starter #5
I have checked the battery, with a load tester. Unless I read the schematic wrong, there is + DC at the starter relay switch, + DC goes thru the 30A fuse via red wire to Ignition Switch to terminal Bat1. When the key is turned to ignition it connects + DC to the fuse box, fuse F (10A) to terminal Bat2 on starter switch(push button) when the button is pushed + DC goes to energize the starter relay switch. + DC then goes to starter motor.
PLEASE correct me if I have got lost some where?
willy
 

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Battery. Change it. It's cheap. I bet that is the culprit. Yes, they will check ok on an autozone tester. But still be essentially dead.
 

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Check your battery earth, and connections both ends (battery and Starter solenoid/engine earth), a bad connection will give your fault.
 
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