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There should be no difference between the plugs and the tool to install them. I'm afraid, by your mention of spark plug inserts, that you may have come to the conclusion that the threads in the head are stripped. :'(There are many different types of inserts, and what you need to determine is the exact thread pitch and diameter. Ideally, you should pull the head to put in an insert. I'm sure that's not something you wanted to hear. If it were me, I would try to do it without removing the head, but I have put in literally hundreds, or perhaps thousands of them over the last 40+ years. This points up the need to use anti seize compound on the threads, and start the plugs by hand to ensure that they are straight. Aluminum heads are delicate.
My question is why would the LR plug, LR plug and the RR plug work with a regular 18mm SP socket and not the RF jug plug, is this normal for the 99?
Are there such things as spark plug inserts and what are they for?
Thanks
Yes sir that'll be the baby you need. It's the same on my 02 1500. no way to do it without that socket. 
Ride With Pride
Quote from: chief on March 31, 2011, 12:35:24 PMwould this be the one RE: Kawasaki parts nation.com 92110B 92110-1153 TOOL-WRENCH,OPEN END,It must be a thin walled socket to fit... I went ahead and bought the kaw tool for that... there is one in the tool set that came with the bike BTW... cheap one, but it works.
Thanks in advance
Tim
Quote from: chief on March 31, 2011, 12:35:24 PMI just bought an 18mm socket but (like me) is to fat. Now I need to find a thin walled socket.It must be a thin walled socket to fit... I went ahead and bought the kaw tool for that... there is one in the tool set that came with the bike BTW... cheap one, but it works.
It must be a thin walled socket to fit... I went ahead and bought the kaw tool for that... there is one in the tool set that came with the bike BTW... cheap one, but it works.
It is all in the Numbers 
http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf
You beat me to the answer. 18mm is the winning size.
Thanks
The size is 18 mm....Just replaced my plugs yesterday
The spark plug gap is 0.8-0.9mm. I had to buy a special socket to fit my 2002 1500. I believe the socket size is 19mm, but it could be 18mm.
Anyone know the metric socket size required for the spark plugs along with the Gap setting. Thanks
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