ER6F 2007, Intermittent running on one cylinder!

[NutsyUk]

Christ after only just fixing the dead relay, I've now all of a sudden developed a intermittent lost cylinder!

Found it out while doing 60 on an A road.... That was bumpy :/

Not really sure when I can take the tank off to take a proper look at the spark plugs. It only happened yesterday...

But in the mean time. Can anyone give me ideas of what to troubleshoot?

Also when the relay died, some one mentioned it could be the regulator going. Could that also break something to do with sparking?
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Yamaha FZ8/Fazer800 (split headlight one) 2014, gingerly getting used to the massive increase in HP and not killing myself in the process! That was easy to get used to.
Kawasaki ER6F 2007 650 Gonna sell as a project bike!
Lexmoto XTR S 125 Sold!

[Easy-X]

[stinkwheel]

It has stick type ignition coils on the plug caps so you could probably switch them over and see if the problem changes sides as a diagnostic tool (uhnplug, change sides, plug into that sides wiring, not just switch them over). If the misfire switches sides, it's the coil/cap. If it doesn't its elsewhere..
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[steve the grease]

A strong diagnostic tool is ' What happened last?' ( "I just filled my car up with petrol" "No you didn't mate, you filled it up with diesel") for example.

You've just had the tank off - maybe something got dislodged putting the tank back - a loose connector has come off, HT lead jumped off going over a bump, check out the simple things first.
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All the above is my personal opinion, you can see my lips move, but I'm talking out of my arse.
I've been riding, and fixing , bikes for 50 years, in that time the more I learn, the less I am absolutely sure of.....

[NutsyUk]

[Bhud]

I dunno... You could end up replacing the whole bike's electrics if you go down this route. You won't like it if you found out it was a loose connection.
To me, and I'm not a pro bike mechanic, it sounds like a loose connection more than anything. This is because I've had this problem before. Riding along, pop pop bang, running on one cylinder or no cylinders. It's getting fuel. What's strangely confusing is that you wait, and sometimes it will start up and everything is fine. And you're riding along, wondering what it could be, and your thoughts go to all sort of things that might need replacing... Nah, replace nothing. Test stuff first. Test your current plugs by taking them out, holding them against the engine and see if they're sparking.

[NutsyUk]

Well i replaced the spark plugs today... And the problem was persisting. Spoke with my local mechanic he thought my coils might be shorting as its a known issue. Gave me a cheap quick short term fix solusion. wrap the coil sticks with insulation tape....
Sadly that didnt fix the problem.

Last ditch effort to fix the bike so i can go to my friends NY do tomorrow...

Drained the tank and ran the left over fuel down...

The thing is I know water has got into the tank in the past as the drainage hole has been blocked before.

Maybe the water level finally reached the pump inlet and the hickups was water in the line.
That or the injectors were blocked.

Anyway i seem to have cleared the problem for now. Did a 5 mile test ride no more hickups... So hopefully would be good for the 150 miles i got to do tomorrow.... wish me luck!
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Yamaha FZ8/Fazer800 (split headlight one) 2014, gingerly getting used to the massive increase in HP and not killing myself in the process! That was easy to get used to.
Kawasaki ER6F 2007 650 Gonna sell as a project bike!
Lexmoto XTR S 125 Sold!

[jeffyjeff]

[Tdibs]

What coil type does it have? sticks or ht lead/cap? It only takes a tiny hairline split for the spark to arc and you drop a cylinder. Insulation tape im sceptical is going to do much.
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Previous : 09 Vanvan 125| 02' Sv650s || Current: 1999 Xj600n | 1992 DR650 RSE | 2005 Fazer 1000

[NutsyUk]