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Removing the Inner spark plug

geebee

geebee

Tuned and Synch'ed
GT Contributor
Joined
Sep 16, 2009
Messages
26
Location
Denver
OK, I tried searching the forum and didnt find any info so I have to ask- Is there a trick to getting out the inner sparkpugs on the 4v Griso? Got the outer ones OK but after removing the tank to get at the innies- it appears they need a really "thin wall" socket. I had this problem with a 2000 Thunderbird and had to grind down a socket to make it fit but the Griso looks to need a really paper thin socket to get to the base of the plug? :woohoo:
 
Success! The Norge dudes had an old post. Now if I just have enough grinding wheels to do an Italian job on my socket.

Geez, you'd think they would have beveled the area out a little more....
 
Just FYI - I did htis about two weeks ago. Fortunatley I had a spare 5/8" socket - thin wall - so it only took about an hour of grinding and checking to get it down to the proper size. Once that was accompolished, the plugs came out with no issues.
 
Lee Brun's has offered to make a run of these sockets, he's going to get some cost info and I suspect post over here. I would gladly pay someone $15 to grind my a socket correctly than scrap several trying to do it by hand
cheers,
 
Well after 45 mins of hand drill grinding I now have an ugly but effective "5/8's-thin wall'" socket. Its new home is in the Griso tool pack. With 13500 miles from new my inner plugs were just slightly over gapped, the electrode noticeably worn. I would say that the bike ran just a little smoother when all was buttoned back up.

A FYI for you guys ready to do this little job. Buy the two inner plugs off the internet. DO NOT buy them from a Guzzi Dealer like I did! I'm not going to mention how much I paid but "out through the butt" would be appropriate. My local NAPA store didn’t have them, my big Motorcycle Parts store also didn’t stock them. After all was said and done I went online and found them at several places for a cheap $13 and change. It appears that they are also OEM for several Ferrari’s. The outer plugs were easily and cheaply picked up at the local NAPA auto parts store. Live and Learn….
:whistle:
 
I couldn`t be arsed to grind one down, so I got one from the Guzzi dealer about 2 years ago, genuine factory supplied tool. Picked it up from the dealer, then he hit me with the bill.................... £19 :eek: :eek: :eek: Didn`t think they`d be soo f******* expensive. Still, I got it now and it don`t cost nothing to feed.
 
I have an old one from my FZR1000R. It was an odd size... 16mm thin wall or something? Seems too large for this job though.

Anyway, point is, if someone makes one, I will DEFINITELY buy one, if they would ship to the UK :)
 
Not sure, but you could have gotten one of these https://www.guzzitech.com/forum/160/3892.html

Also Graham has posted the tune up procedure for the 1100 Breva on the forum. You could search that out. He gives the dimension he ground the socket to for clearance. I made mine by trial and error. Grind it some, try it, no go grind a little more until it worked.
 
I bought the Motion Pro 5/8" thin wall socket from Motorcycle Superstore. Worked like a charm.
Plugs didn't look so good after 15,000 miles.
Why were the inner plugs white and the outer plugs black? Squish area?
 

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Try packing the ETS with something. That'll lean it out a bit. The plugs are a very high mileage maintenance item. Don't give them too much thought. Take the inners out and lube them by all means but unless you think there is something *wrong* they should be a close to 100,000Km item. Lots of cars use less fancy plugs and habve that change interval. Nothing *different* happens in a correctly tuned combustion chamber and Guzzis don't rev that much quicker than many modern 4 cylinder cars so.......

Follow the dots.

pete
 
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