2000 RC51 - Kill Switch - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 12 (permalink) Old 03-20-2019, 02:58 PM Thread Starter
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2000 RC51 - Kill Switch

Hello

Beginner track day guy and I just picked up a 2000 RC51. (was on the dream bike list)

In order for it to pass tech I need the kill switch to work.

From what I can tell the handle bar part works. So here I am.

Anyone have any thoughts on how I diagnose the root cause?

I looked on the forum and did not find anything

Thank you

Scott
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post #2 of 12 (permalink) Old 03-20-2019, 04:36 PM
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What's not working exactly? If you hit the kill switch the bike keeps running?
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post #3 of 12 (permalink) Old 03-21-2019, 08:54 AM Thread Starter
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Correct the Kill switch does not stop the engine when it is running

I drove 7 hours to pick it up and noticed this and two other items upon inspection

The mechanic took a look at the switch and said that it was working at the handle bar and that this issue was after the switch and it would take a more time to diagnose. I choose to take a $200 discount and figure it out myself. I wanted to get back home before midnight.

The other two items
1) Manuel switch has been added to activate the cooling fans
2) Left tail brake like does not work (not a big deal for a track day bike)

Thank you for your guidance

Scott
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post #4 of 12 (permalink) Old 03-21-2019, 09:27 AM
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the kill switch connects the black/white and black in the harness.


with the bike running, if you unplug the killswitch assembly does the bike stop?
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post #5 of 12 (permalink) Old 03-21-2019, 09:51 AM Thread Starter
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I will check and get back... Thanks
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post #6 of 12 (permalink) Old 03-24-2019, 09:55 AM Thread Starter
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Hello Wibbly

No, it still keeps running when I unplug it.

Scott
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post #7 of 12 (permalink) Old 03-24-2019, 10:16 AM
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see if you can find the BAS relay. it's in the tail and will have a couple of reds and a couple of blacks on it. see if it looks tampered with (extra wires or splices)


unplug that with the bike running. if the bike stops, try replacing the BAS relay with the high beam relay. it's very unlikely but if the BAS relay is failed closed your killswitch won't work.

after putting the high beam relay in its place, see if the system behaves normally, if it does you need a new relay.


do you have a multimeter? because a few tests would be useful to do here.
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post #8 of 12 (permalink) Old 03-25-2019, 11:31 AM Thread Starter
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Thanks Wibbly

I could not get back on it yesterday. Kids Hockey tournament.. They kept winning and got the gold..

I will likely get back to it this evening. Great ideas and thanks.

And yes I am pretty good with a multimeter.


Scott
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post #9 of 12 (permalink) Old 03-25-2019, 11:53 AM
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Let me know if what I suggested takes you in the right direction.

If it doesn't I'll probably just get you to call me and we will figure it out.
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post #10 of 12 (permalink) Old 03-26-2019, 09:59 AM Thread Starter
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Wibbly

I sent you a PM.. After re reading your steps I did not follow them 100%.
I actually swapped the relays (vs trying it with the one unplugged) and I still have a kill switch that does not work.... yet

Scott
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