Start buttons killing bike - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 11 (permalink) Old 08-11-2015, 12:17 AM Thread Starter
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Start buttons killing bike

When turn the key on, the dash light will light up..if i engage the start button the bike dies and dash lights go off, i can wait a while and they'll come back on but it dosent want to turn over or Lee me press the kill switch down...ignition relay?
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post #2 of 11 (permalink) Old 08-11-2015, 12:20 AM
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battery is dead, charge or replace


2003 SP2: Everything I could find.
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post #3 of 11 (permalink) Old 08-11-2015, 12:34 AM Thread Starter
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Battery is new. When i go to start you can hear a pop like the ignition or starter solenoid is going out
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post #4 of 11 (permalink) Old 08-11-2015, 03:54 PM
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Symptoms are similar to an old battery that doesn't have sufficient current capacity anymore. Just like what happened with my VFR800.
Or there's a bad/corroded connection that doesn't allow sufficient current flow.

In other words, the battery doesn't have the capacity to provide starting current while maintaining 12V for the electrical/electronic components.

On my VFR800, if I measure across the battery posts, I got 13V. But when I pressed the starter button, it dropped to less than 4V.
I replaced the battery, and everything works fine.
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post #5 of 11 (permalink) Old 08-11-2015, 07:23 PM Thread Starter
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New battery and i keep it on a stand so the kick stand dosent drain the battery...have you had any solenoid problems
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post #6 of 11 (permalink) Old 08-11-2015, 07:27 PM
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People keep saying the same advice because a new battery doesn't mean it is a good battery. Test with another battery.
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post #7 of 11 (permalink) Old 08-11-2015, 07:29 PM Thread Starter
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So why the loud pop when trying to start
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post #8 of 11 (permalink) Old 08-11-2015, 07:42 PM
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Who cares at this point. Try the easiest logical choices first, unless you want to start with much more work like checking all the fuses and associated wiring, swapping/buying relays, etc.
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post #9 of 11 (permalink) Old 08-11-2015, 08:07 PM
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Quote:
Originally Posted by t.austin View Post
So why the loud pop when trying to start
If you hear that loud of a pronounced "pop" from a relay, you may be on to the issue.

As per @jondog9

"Relays can fail intermittently, at least for a while, before they're toast.
You can use your highbeam relay socket to test the fuel relay and also the bank angle relay. If your bank angle relay is giving out, then the fuel relay wont get power."

Another words, some of these relays are the exact same and can be swapped to help you troubleshoot.



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post #10 of 11 (permalink) Old 08-11-2015, 09:57 PM
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Disconnect the battery cables, then check the starter relay contacts.
It's just forward of the rectifier/regulator.
It's been known for the contacts to corrode, causing a resistive element in the electrical path, leading to melting of the contacts in the relay and wires.
The starter relay is also where the main 30A fuse is located.
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