Must be a simple 'bike won't turn on' issue - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 29 (permalink) Old 12-28-2013, 10:05 PM Thread Starter
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Must be a simple 'bike won't turn on' issue

Hey folks,
First time forum diving so go easy on me. I am one of the few RC51 riders in SoCal since we are in an era of R1s and CBRs and whatnot. And we all get a lot of good looks when we ride this beast.

Well I have run into a snag. As I am not a grease monkey, I am having an issue with starting my bike. Now I have had my ride for over three years. It is a 2002 and has been very good to me. So here is the deal:
Turn key to on, prime the fuel tank, bike is in neutral-double checked it by rocking it so we are good there. So far all the start up procedures are in place and good to go. Now I go to start the bike and nothing happens. It acts like the bike is in gear, you know you push the button and nothing happens. Just like that, you see. I looked around and even found a few fuses and all was good to go.

So what do I do now? Help me Obi-one-kinobi, you're my only hope. Hahaa. But for reals, I need some 51 love over here.
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post #2 of 29 (permalink) Old 12-28-2013, 10:09 PM
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Are you seeing the neutral light on the gauges?



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post #3 of 29 (permalink) Old 12-28-2013, 10:10 PM Thread Starter
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Yes, sir. Nice and green.
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post #4 of 29 (permalink) Old 12-28-2013, 11:08 PM
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For whatever reason, your starter relay is not actuating.

I would check your side-stand switch first as it most often fails over the clutch lever micro-switch.
Check the clutch micro-switch next.

The engine stop switch can be problematic as well, but you said the fuel pump primes, so that is probably not a problem.
Since your neutral light comes on, the neutral micro-switch appears to be working.

Here's a diagram of the circuit involved from the service manual.

Last edited by SubSailor; 12-28-2013 at 11:14 PM.
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post #5 of 29 (permalink) Old 12-29-2013, 05:04 AM
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It does sound like an electrical problem. Have you done anything with the wiring in the tail section of the bike recently?

Honda SP1.5 owner
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post #6 of 29 (permalink) Old 12-29-2013, 08:42 AM
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Quote:
Originally Posted by SubSailor View Post
For whatever reason, your starter relay is not actuating.
With that being said, could it be the starter relay itself? Or if the starter relay went out, would the fuel pump not prime?

Just another idea. Keep us updated.

2001 SP1 (sold)
2004 SP2 (properly stored)
2012 Ruckus (stolen)
2015 Grom (under construction)

Weyrauch pronounced (Y Rock)...Rock for short.

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post #7 of 29 (permalink) Old 12-29-2013, 10:59 AM
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It could be a problem with the starter relay.
The main 30A fuse is located in the starter relay housing.
If that blows, no current will reach the starter motor.

When you press the start button, do you hear the starter relay even click?
If not, your start button may be the culprit.

Last edited by SubSailor; 12-29-2013 at 11:03 AM.
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post #8 of 29 (permalink) Old 12-29-2013, 11:16 AM
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I think SubSailor nailed it. It could be the starter relay. There's a 30 amp fuse next to the starter relay that should be checked as well. (Don't confuse it for the spare 30amp fuse that Honda has had the foresight to include. )
The starter relay is the one relay that can't be interchanged. You either have to test it, or exchange it for a known good one.

Of course, you can jump across the relay to bypass it to see if the starter motor will engage.

One other thing, make sure your fuses are all good in the little fuse panel on the left side of the bike.
Use a dab of dielectric grease on all your electrical connections.


btw cdemps, I'm not aware of any "grease monkeys" around here.

John, 2000 RC51 #000100

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post #9 of 29 (permalink) Old 12-29-2013, 10:14 PM
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You said you checked the fuses, but again check the fuse box on the state of 10A Fuse F.
It's the 10A fuse in the diagram I posted in post #4.
That fuse affects starter operation and ignition. If it blows, no starter operation.
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post #10 of 29 (permalink) Old 12-29-2013, 10:51 PM Thread Starter
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Gents,

I appreciate the good info. I will check the starter relay. I will have to locate that thing on my bike but from what you all are talking it does sound something as simple as a fuse.

And no offense meant on the term 'grease monkeys.' I will give you all a heads up on what happens.

I think I am a fan of this forum stuff. Good lookin' out, gents.

Til then...
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