No spark

[Blubber]

What brand plugs were they ?


I've had new Ngk's fail on me before

[lawrie]

NGK CR8EK new in boxes.  C=10mm thread,  R= reistor plug,  8= heat range, E= thread length 19mm, & K= twin electrodes.

The BIG mystery is that they DID work & have only done less than 10 miles as I don't actually use the bike, now all 4 failed at the same time?

[KiwiCol]

Bung those plugs into your other 14 & you'll soon see if it's them.

[Tony Nitrous]

It may not be directly related to this thread, but I know a while back there were "Fake" NGK plugs coming out of China.

[lawrie]

Bung those plugs into your other 14 & you'll soon see if it's them.

I did, & they don't!!
I did mention the fact 3 or 4 posts ago.

[lawrie]

It may not be directly related to this thread, but I know a while back there were "Fake" NGK plugs coming out of China.

Yeah Tony, I did wonder about that myself, but to be honest, they LOOK OK.

[Andre]

Odd indeed. Glad you sorted it out (hopefully). Looks can be deceiving. Them fakers can be very good. Haven't heard of anything killing all plugs at once. So, I asked my good friend google "killing spark plugs". Immediately found a post where where a guy had this issue all 4 new NGK dead. Fitted the old ones - engine runs. He got another set of plugs and engine didn't start. He put another old? coil in and engine starts with the new plugs.

Who knows if it was a bad coil killing the plugs or fake plugs killing the coil, I don't. But definitely would get my next plug from a "reputable" (for sure a different) dealer and test the crap out of the coils.

Added: And use Tony's above image and the old plugs to check if you got non-fakes.

[KiwiCol]

Bung those plugs into your other 14 & you'll soon see if it's them.

I did, & they don't!!
I did mention the fact 3 or 4 posts ago.

Sorry Lawrie, when I looked at it this morning (6.30am) I missed all of the additions to this thread & just read the ones on the new page.  my error.

[Hooli]

Nice one, I've not heard of four plugs failing together before either.

Tickover should be 1,100rpm. But I run mine nearer 1,000rpm as I find it a touch nicer for creeping through traffic.

[RickC]

I had a similar problem with too cold a plug  being fitted. The ceramic insulator gets coated in unburnt fuel which provides a short to earth bypassing the plug gap. You can burn it off with a cigarette lighter but I would bin the plugs. You may be creating the problem by not getting the plugs hot enough when you kick it over.