Bike stutters from time to time - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 9 (permalink) Old 06-13-2017, 12:48 PM Thread Starter
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Bike stutters from time to time

Hi All

As I was driving home from work today the bike suddenly started to "stutter" .
Was in 6th around 4500rpm I wanted to accelerate but the bike stuttered.
I dropped a gear and it went away but after a few kilometers it just came back.
On idle the bike runs perfect.

I'm thinking about the CDI or an ignition coil.
When I serviced the bike last weekend the rear spark plug was wet while the front one wasn't.

Other than that the bike has an aftermarket undertray and all modules are laying loose in the back.
Hence my idea that the CDI might be [email protected]%#

The thing is that it comes and goes as it pleases.

Any other idea what might be the cause ?

Thanks !!

Last edited by Nilskez; 06-13-2017 at 02:24 PM.
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post #2 of 9 (permalink) Old 06-13-2017, 02:31 PM
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Battery connection is loose or you are grounding out somewhere from the lose wires getting rubbed bare.
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post #3 of 9 (permalink) Old 06-14-2017, 01:25 AM Thread Starter
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Thanks LDH !!

My plan of attack is as following :

- Looking for loose and rubbed wires
- Velcrotape all loose electrical parts in the back

Hope that when I take her for a spin after it she won't do it anymore.
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post #4 of 9 (permalink) Old 06-15-2017, 01:32 AM
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Definitely tidy up the relays, ecu, wiring and whatever else you have in the tailsection. You don't want that stuff sloshing around.
Before you go diving into the components, I'd suggest starting with going thru all connectors. Inspect, clean and dab of dielectric grease. Make sure the battery is a healthy one, (no less then ~12.8V at rest) and connections are clean and tight.
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post #5 of 9 (permalink) Old 06-15-2017, 05:52 AM Thread Starter
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Quote:
Originally Posted by jondog9 View Post
Definitely tidy up the relays, ecu, wiring and whatever else you have in the tailsection. You don't want that stuff sloshing around.
Before you go diving into the components, I'd suggest starting with going thru all connectors. Inspect, clean and dab of dielectric grease. Make sure the battery is a healthy one, (no less then ~12.8V at rest) and connections are clean and tight.
Thanks for the info !
I did that Yesterday, all connectors are good, no rubbed wires and battery is new.
The dielectric grease I still have to do as I don't have any.
The ECU wasn't in it's normal secured location and the relays where just laying wherever they landed...
I tidied everything up and will take it for a spin on Sunday.
If I'm luck and able to get my hand on the dielectric grease I'll do it before the test drive.
Will let y'all know the verdict on Sunday :-)
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post #6 of 9 (permalink) Old 06-15-2017, 06:20 PM
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Does your tailsection still have the rubber holders for the relays?

I traded my SP1 subframe out for a SP2. Here's how it came out.

Edit: I hope these pics show in a decent size. When I click on them in the viewer, they're pretty damn small. The original file size is jpeg 0.98MB. Pic should be way bigger, no?
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post #7 of 9 (permalink) Old 06-16-2017, 02:08 PM Thread Starter
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Quote:
Originally Posted by jondog9 View Post
Does your tailsection still have the rubber holders for the relays?

I traded my SP1 subframe out for a SP2. Here's how it came out.

Edit: I hope these pics show in a decent size. When I click on them in the viewer, they're pretty damn small. The original file size is jpeg 0.98MB. Pic should be way bigger, no?

They have the rubber holders around them yes.
I now velcro-taped them to the subframe and took it for a ride a few minutes ago and all is fine
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post #8 of 9 (permalink) Old 06-16-2017, 04:23 PM
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You might discover that the tape melts and slides around from the heat in there. On hot days, the reg/rec throws out a lot of heat inside the tailsection. It's vented failry well, as long as your trunk area isn't stuffed full of whatever.
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post #9 of 9 (permalink) Old 06-17-2017, 12:45 PM Thread Starter
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You might discover that the tape melts and slides around from the heat in there. On hot days, the reg/rec throws out a lot of heat inside the tailsection. It's vented failry well, as long as your trunk area isn't stuffed full of whatever.
You are correct.
Just came back from a nice evening ride with my girl on the back and one of the relays tape melted loose.
Lucky I had positioned in such a way that it was still upwards and couldn't move all that much cause I didn't have any issues.
I'll have to make some custom brackets...
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