Subject: New spark plugs, every year? Mon Dec 01, 2014 12:10 pm
This is what the manual says, change em once a year. Is this what everyone does? Or is it a conspiracy to sell expensive plugs? My other bikes had the plugs up to 10K miles and they looked fine. Does the GRiSO wear them out faster?
Pete Roper GRiSO Capo
Posts : 10711 Join date : 2013-05-29 Age : 67
Subject: Re: New spark plugs, every year? Mon Dec 01, 2014 12:51 pm
No. Nor is there any need to use the platinum plugs suggested for the early models. Unless they give you grief they'll go a lot longer. Most cars nowadays have 50,000 mile plug change intervals. A higher revving engine like the GRiSO, (Well, higher than most cars.) will wear 'em out slightly quicker but yearly or 10,000 changes are a bit of overkill, as is swapping the brake lines every three years and that is suggested too for some reason???
Pete
daniel_pww and BobW981 like this post
Triman023 Tiradritto
Posts : 306 Join date : 2014-06-05 Age : 74
Subject: Re: New spark plugs, every year? Mon Dec 01, 2014 1:01 pm
Perhaps they get a cut from the companies that make these..
Must be some extra picky tech in the background somewhere..
Steak Godfather
Posts : 3154 Join date : 2013-05-28 Age : 59
Subject: Re: New spark plugs, every year? Mon Dec 01, 2014 3:29 pm
The NGK Iridium plugs are a fine - CR8EIX (4218), and less expensive, substitute for the NGK Platinum long-life series. I generally swap mine out every other fluid/valve adjustment/TB balance interval - or every 12,500 miles, but I do inspect them at every interval (6250 miles) when adjusting the valves.
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- [You must be registered and logged in to see this image.]
2012 MOTO GUZZI GRiSO 1200SE
2013 MOTO GUZZI STELVIO 1200NTX - Orange Blossom Special
Knockerjoe and daniel_pww like this post
Grisonut GRiSO
Posts : 1406 Join date : 2014-01-02
Subject: Re: New spark plugs, every year? Mon Dec 01, 2014 5:31 pm
I use the Iridium as well and plan to leave it there until I get to the 30K miles mark or so...
daniel_pww likes this post
Phang Biondino
Posts : 214 Join date : 2013-11-22 Age : 52
Subject: Re: New spark plugs, every year? Mon Dec 01, 2014 11:38 pm
Mine are 20k km (12.5k miles) / 5 years.
I pulled the spark plugs of a 30k km (19k miles) Stelvio recently, stilling running on the plugs from the factory. Those NGK PMR8B has no obvious wear to my naked eyes as well as the gap gauge.
daniel_pww likes this post
Steak Godfather
Posts : 3154 Join date : 2013-05-28 Age : 59
Subject: Re: New spark plugs, every year? Tue Dec 02, 2014 5:00 am
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- [You must be registered and logged in to see this image.]
2012 MOTO GUZZI GRiSO 1200SE
2013 MOTO GUZZI STELVIO 1200NTX - Orange Blossom Special
daniel_pww likes this post
Evilgarfield Grignapoco
Posts : 173 Join date : 2021-03-25
Subject: Re: New spark plugs, every year? Thu May 06, 2021 1:15 am
What plugs should I use for a GRiSO 1100 from 2007? I'm a bit lost with all these different types of plugs with different electrodes etc...
GuzziSteve Fra Cristoforo
Posts : 828 Join date : 2016-04-14
Subject: Re: New spark plugs, every year? Thu May 06, 2021 5:38 pm
I like stock, outer--NGK BPR6ES inner---NGK PNR8B If you haven't done the inside plugs, may be rusty & full of crud in the well. Blow out after cracking them loose.
burntclutch, Bobcat Sig, Evilgarfield and daniel_pww like this post
Oz1200Guzzi Don Abbondio
Posts : 6086 Join date : 2014-03-13 Age : 69
Subject: Re: New spark plugs, every year? Thu May 06, 2021 6:06 pm
The inner plugs will rust and gather crud as others have said. Might be worth a very light coat of neverseize or similar on the threads to assist in removal "next time". I had my originals in for over 60,000 km - they were still good but I replaced them because of rust.
daniel_pww likes this post
burntclutch GRiSO Capo
Posts : 48 Join date : 2018-11-18
Subject: Re: New spark plugs, every year? Sun May 09, 2021 7:36 am
it might be worth noting the inner will need a thin wall socket also
daniel_pww likes this post
Evilgarfield Grignapoco
Posts : 173 Join date : 2021-03-25
Subject: Re: New spark plugs, every year? Tue May 11, 2021 4:33 am
GuzziSteve wrote:
... inner---NGK PNR8B ...
Funny, the spare part catalog for the 1100 gives the PNR8B as you wrote it but I can't find them online. Closest match is PMR8B. Is that a typo in the spare catalog?
daniel_pww likes this post
GuzziSteve Fra Cristoforo
Posts : 828 Join date : 2016-04-14
Subject: Re: New spark plugs, every year? Mon Jun 28, 2021 12:25 am
We don't have any issue in USA, check with TeoLamers.
paulbrice GRiSO Capo
Posts : 1532 Join date : 2015-01-04 Age : 63
Subject: Re: New spark plugs, every year? Mon Jun 28, 2021 4:30 am
Apparently both names are used ....see below from Gutsibits website
Subject: New spark plugs, every year? 
Mon Dec 01, 2014 12:10 pm
This is what the manual says, change em once a year. Is this what everyone does?
