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General Category => Maintenance => Topic started by: Bminder on May 22, 2013, 09:59:26 PM

Title: Spark plug socket size and what spark plugs to get?
Post by: Bminder on May 22, 2013, 09:59:26 PM
So I my 92 FJ1200 purchase home. It hasn't been running for 3 years, the tank was drained but not the carbs. I want to pull the plugs, but they must be a metric size. 13/16 is too big, and 5/8 is too small. The parts store told me that's all they carry for plug sockets.
What size are the plugs?
Also, what brand of plugs do these motors like best?
Thanks
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: racerrad8 on May 22, 2013, 10:11:49 PM
18mm

Randy - RPM
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: yamaha fj rider on May 22, 2013, 10:28:51 PM
Any quality spark plug you should be ok. I think my 93 came with NGK.

Kurt 
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Bminder on May 22, 2013, 10:32:12 PM
Thanks guys.
So these motors aren't too picky about what plugs you use?
Some engines are kind of finicky about their plugs.
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Pat Conlon on May 22, 2013, 10:44:20 PM
It depends on the oil you're using......  (popcorn)
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Bminder on May 22, 2013, 11:07:55 PM
Haha, ok. What oil do you recommend?
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Harvy on May 22, 2013, 11:30:45 PM
resistor - NGK DPR8EA-9.    standard NGK DP8EA-9.   Iridium NGK DPR8EIX-9

Al .9mm gap


Harvy
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: movenon on May 22, 2013, 11:35:07 PM
Quote from: Pat Conlon on May 22, 2013, 10:44:20 PM
It depends on the oil you're using......  (popcorn)

Pat, your feeling feisty tonight   :diablo: :diablo:  (popcorn)
George
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: ribbert on May 23, 2013, 03:21:14 AM
Quote from: Pat Conlon on May 22, 2013, 10:44:20 PM
It depends on the oil you're using......  (popcorn)

....and whether you're running double clutch springs, in which case you left hand would have developed enough strength not to need one.
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Steve_in_Florida on May 23, 2013, 08:18:10 AM

Kind of along the lines of this thread:

I want to perform a compression test on the bike.

What size adapter is required to fit the spark plug hole?

The gauge I have has an 18mm and 14mm adapter, but they're too big.

Title: Re: Spark plug socket size and what spark plugs to get?
Post by: movenon on May 23, 2013, 08:49:18 AM
Quote from: Steve_in_Florida on May 23, 2013, 08:18:10 AM

Kind of along the lines of this thread:

I want to perform a compression test on the bike.

What size adapter is required to fit the spark plug hole?

The gauge I have has an 18mm and 14mm adapter, but they're too big.



Spark plug thread size 12mm X 1.25. Take a look at this adapter  http://www.toolsource.com/adapter-clt2-compression-tester-14mm-12mm-p-100140.html (http://www.toolsource.com/adapter-clt2-compression-tester-14mm-12mm-p-100140.html)
Spark plug TQ 12.5 ft lbs
George
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Bminder on May 23, 2013, 12:17:11 PM
The Clymer books says to use 20/40 weight oil.
Will 10/40 work?
What are most running?
And is there an advantage to full synthetic? I switched from synthetic blend to Mobile 1 in my Dodge Ram 5.9 gas and it started using oil and I saw no improvement in mileage, so I switched back to synth blend and it stopped using oil.
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Pat Conlon on May 23, 2013, 01:14:10 PM
Serves me right for opening the door...

10w-40 is fine. Any oil is fine as long as it doesn't have friction modifiers in it.
Full synthetic is fine, synthetic blend is fine, Dino oil is fine.

Oil is a debated topic on this forum. Everyone has their favorites. Do a search for more discussion.

Cheers.
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: Bminder on May 23, 2013, 02:27:13 PM
Over the years I've read tons of discussions and reports on motor oils.   Seems like the conclusion is that all oils are so good these days compared to 40 years ago that anything you use will exceed the manufacturer's requirements.

So I go to my backup parts store Autozone because my main parts store Advance Auto doesn't carry 18mm sparkplug sockets.
The guy at Autozone says, "I've never heard of 18mm sparkplug sockets, I don't think there is such a thing."
And we walk over to the socket section and right there is an 18mm sparkplug socket.
Title: Re: Spark plug socket size and what spark plugs to get?
Post by: FJSpringy on May 23, 2013, 03:15:41 PM
Quote from: Bminder on May 23, 2013, 02:27:13 PM
Over the years I've read tons of discussions and reports on motor oils.   Seems like the conclusion is that all oils are so good these days compared to 40 years ago that anything you use will exceed the manufacturer's requirements.

So I go to my backup parts store Autozone because my main parts store Advance Auto doesn't carry 18mm sparkplug sockets.
The guy at Autozone says, "I've never heard of 18mm sparkplug sockets, I don't think there is such a thing."
And we walk over to the socket section and right there is an 18mm sparkplug socket.

If its anything like the auto stores near me it's instant dismissal once the employee exhibits any product knowledge