VFRDiscussion ARCHIVE / READ-ONLYREAD-ONLY

Here's a fun electronic gremlin

2 posts Started 6 Jun 2025 Last recovered post 7 Jun 2025 Wayback Machine snapshot 8 Jun 2025

#1

[image: image.thumb.png.49472d74219cdc6510bf7fcd11ffa6aa.png]


No, but seriously, on occasion my 5th gen's motor will stop running for a very short interval.
With one exception, there's no one factor that is consistent.
It'll stutter in any gear, at any speed or RPM level. It doesn't matter whether or not the engine is up to temp.
It *has* happened as I've been slowing down and coming to a stop, but it has never happened when I start the bike and it's idling or if I'm at a stop and idling.
It doesn't matter if the road is smooth or rough, although it's a lot more taxing on rough roads.
Sometimes it'll only hiccup once. Other times it'll feel like the bike is shuddering.
It gets exciting when it happens as I'm going around a corner or turning at low speed.

The reason I believe it to be an electronics problem, as opposed to fuel is that all 4 cylinders drop out simultaneously.
If it was an injector or dirty gas, I would expect it to run rough instead of dropping out completely

It's also been occurring long enough that it's happened with many different tanks of gas.
I use ethanol-free 87, which I get from 2 different stations that are near to me.
There are other stations on the island that carry ethanol-free gas, but like I said, I don't think the issue is fuel.

There's no other electrical issue that occurs, like dimming lights or the clock resetting, so it's not a major grounding issue.

The injectors share a ground, though, along with the intake duct control solenoid valve, which I'm pretty sure I've disconnected.

I've even swapped out the ECM.

Any cogent thoughts are welcome.

#2

Man... you need to use the search bar. 

How many miles?

How does it look?

How hard has it been ridden?

last time the oil was changed?......

'Do these bikes have the TOS?' I DUNNO

Again, i'm a carb'd street & track rider, so take my advice with a grain of salt...

check these things... PLEASE

-Sidestand switch-

-clutch lever switch-

-ignition switch-

^No power loss all the time, just random?

^No dead battery?

^no dimming so it's not the stator or reg/rect...

^smooth or bumpy roads?

^

End of thread · 2 posts recovered Wayback Machine snapshot 8 Jun 2025