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Firing on 3
Moderators: chrisu, paul doran, Taffus, KeithZ1R
Firing on 3
My z1000 1979 which has a mk11 engine is again starting from cold on 3 cylinders. Had same problem in Spring. I put new plugs in and all was well. Only covered about 300 miles and it's at it again. Starts fine with choke, then runs on 3 with some back firing and odd shot of flame. Given 3 minutes or so number 4 kicks in and runs beautifully. Took it a 50 mile run then left for a couple of days. Same thing happens all over. Plugs are bog standard ngk b7es. Not had chance to pull plugs yet but last time one was not sparking. Advice welcome please on changing plug spec or other thoughts? Thanks, Ian.
Re: Firing on 3
First off swap lead & plug with other one on same coil..... ie: 1 - 4 or 2 - 3..... any changes?
Then get some Denso plugs..... NGK can be dodgy, even new plugs can be naff.
Newer plugs seem to give up the ghost soon as they "wet" and never recover fully!?
Then get some Denso plugs..... NGK can be dodgy, even new plugs can be naff.
Newer plugs seem to give up the ghost soon as they "wet" and never recover fully!?
And on the 7th day... Zeds were created!
- warren3200gt
- Hardcore
- Posts: 2686
- Joined: 13th Jun 2014
- Location: Dartford Kent
Re: Firing on 3
Ebay ngks are often fakes and real shite. Even genuine ngks need at least one grade hotter with modern fuels.
Get denso's you know it makes sense.
Get denso's you know it makes sense.
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
Re: Firing on 3
Thanks for replies. I swapped leads and plugs last time, was the plugs. Will do same again asap. Will follow advice here and get some Denso plugs.w22es u yes?
Re: Firing on 3
I use IW24... the Iridium plugs - a bit pricey but always done me well over several bikes in the last +10yrs
And on the 7th day... Zeds were created!
Re: Firing on 3
Thanks again il give them a whirl.
Re: Firing on 3
Fuel can go off in a few weeks , if it wets a plug then usually the plug is shot . Any bike we get with fuel issues we use Shell v power in them as it has the least ethanol.
"Be on good terms with all persons. Speak your truth quietly and clearly, and listen to others; even the dull and ignorant. They, too, have their story."
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- Custard Cream
- Posts: 804
- Joined: 20th Oct 2016
- Location: Ipswich
Re: Firing on 3
Where do people get Nippon Denso plugs from
I've found SparkPlugs.co.uk and the ordinary ones are £2 each and the iridium ones £8 each, which seems suspiciously cheap to me.
I've found SparkPlugs.co.uk and the ordinary ones are £2 each and the iridium ones £8 each, which seems suspiciously cheap to me.
An expanding collection of parts pretending to be a Z1100R and a Yamaha FZ750
Re: Firing on 3
I buy mine from here - http://www.ebay.co.uk/itm/IW27-DENSO-IR ... 2749.l2649
They are the cheapest I can find at just under £7 each.
The ones in the listing are NGK9 equivalent which I favour in non stock motors.
They do hotter grades for the same price.
They are the cheapest I can find at just under £7 each.
The ones in the listing are NGK9 equivalent which I favour in non stock motors.
They do hotter grades for the same price.
- warren3200gt
- Hardcore
- Posts: 2686
- Joined: 13th Jun 2014
- Location: Dartford Kent
Re: Firing on 3
Julian_Boolean wrote:I've found SparkPlugs.co.uk and the ordinary ones are £2 each and the iridium ones £8 each, which seems suspiciously cheap to me.
I get mine from them and have not had any issues.
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.
Re: Firing on 3
warren3200gt wrote:Julian_Boolean wrote:I've found SparkPlugs.co.uk and the ordinary ones are £2 each and the iridium ones £8 each, which seems suspiciously cheap to me.
I get mine from them and have not had any issues.
Yes I have bought from them, very good, had a similar problem on my z250, had a chat with the man from Spark plugs, very helpful sorted out my problem.
CB125 GT380 CB750F1 Z1R GPZ 750 Turbo Z1R
Re: Firing on 3
Try gently pulling the plug cap of the offending plug slightly while its ticking over. You should hear it start to fire when there's a gap between the cap and the plug. Let it run for 30sec or so while it warms up and cleans itself. You won't get a shock as long as your leads and caps are good but if you're not brave use some pliers.
Last edited by floydsz1 on Fri Oct 06, 2017 11:03 pm, edited 1 time in total.
Z1b,
zxr750 m2,
zrx1200
Z1000j lawson race bike,
Versys 1000gt (2019),
Gsxr750H.
zxr750 m2,
zrx1200
Z1000j lawson race bike,
Versys 1000gt (2019),
Gsxr750H.
Re: Firing on 3
Fitted IW24 plugs this morning. Fired up on all 4 and settled nicely on tickover. Took for spin and all is good. Thanks for the help. Fingers crossed these plugs will last longer than the NGK ones did.
Ian.
Ian.
Re: Firing on 3
If there is a specific underlying problem, it'll raise it's head again, but them Denso's is the business
And on the 7th day... Zeds were created!
Re: Firing on 3
Thanks Mr Pigford...now il be worrying lol. Actually I have been wondering what might cause this problem other than crap plugs. The twice that its happened it has been number one first time and number two plug the second time that gave up the ghost. They look fine but just don't spark. Have to wait and see.
Ian.
Ian.
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